Mass of hydrogen = 1 g/mol. D) 6.022 1023 E) none of the above, How many moles of fluorine are in 3.2 moles of xenon hexafluoride? C) 1, 2, 1/2, 1 E) none of the above, How many molecules of sulfur trioxide are in 78.0 grams? C) No, the formation of gas bubbles is a secondary chemical reaction which is ignored. C) indicates the structure of the molecule. E) none of the above, What are the coefficients for the following reaction when it is properly balanced? 4 moles of oxygen. B) 2 B) 4.93 In your case, you have 0.400 moles of ptoassium sulfate, which means that you have 0.400moles K2SO4 2 moles K 1moles K2SO4 = 0.800 moles K How many moles of Pb are in 4.71 1021 Pb atoms? E) none of the above, A chromium oxide compound contains 104.0 grams of chromium and 48.0 grams of oxygen. A) CH3O2 An empirical formula represents a molecule. Which of the following is already in its empirical formula? 16.0 g B. B) N2H2 B) 5 C) Na + H2O NaOH (aq) + H2 (g) B) decomposition The chemical formula CH2O can be classified as: A chromium oxide compound contains 104.0 grams of chromium and 48.0 grams of oxygen. A 15.5 grams sample of diphosphorus pentoxide contains how many grams of phosphorous ? E) none of the above, 26) All of the following compounds are soluble in water EXCEPT: D) 11.2 density of potassium sulfate is equal to 2 660 kg/m; at 20C (68F or 293.15K) at standard atmospheric pressure . SURVEY . C) 2.12 1025 A. E) none of the above, An estrogen compound with the empirical formula C12H17O2 has a molecular mass of 386.6 g/mol. E) none of the above, What is the molecular formula of a compound given the molar mass of the compound is 186.5g and the empirical formula is C2H7? What is the mass percent of hydrogen in water? A. A) Li. B) SO2 (g) B) K+ D) 62.0 )were added and the resulting reaction mixture was stirredfor 3 h at RT. c) a $120-\mathrm{kg}$ linebacker with a speed of $10 \mathrm{~m} / \mathrm{s}$, B) 2 A) 0.00782 The pilot decides to accomplish this by banking the wings at an angle of $38^{\circ}$ while moving in a level circular path. A) 123.0 g/mol One mole of water contains 1/2 mole of oxygen atoms. He or she would either excise aspect of the mole, ie a modest tissue sample for . A) If there is no coefficient or subscript, a one is implied. 2 moles of sulfur C. 1 mole of potassium D. 3 moles of potassium E. none of the above 2. Why? A) 4 moles of oxygen. C) 207.2 A) precipitation NaCl(aq] Na+ (aq] + Cl (aq] H2 What is the mass of 1.56 1021 atoms of magnesium in grams? A nonconducting sphere of radius 6.00cm6.00 \text{~cm}6.00cm has a uniform volume charge density of 450nC/m3450 \text{nC} / \text{m}^3450nC/m3. D) 13.5 You would then divide the moles and potassium hydroxide by its volume, the measured volume of 0.1 leaders in order to determine the concentration of potassium . A) 40.08 g/mol The masses for a mole of each element are given on the periodic table as the atomic weight. A) 4 This means that 1 mole of potassium sulfate will contain 2 moles of potassium, 1 mole of sulfur, and 4 moles of oxygen. it. D) The NaCl will fail to dissociate. A) 2.24 An iron chloride compound contains 55.85 grams of iron and 106.5 grams of chlorine. D) 1, 1, 2, 2 Calculate the molar mass of ammonium carbonate. Bauxite is an ore that contains the element aluminum. What is the formula of the oxide? B) 2, 1, 1, 2 D) 1, 1, 1, 2 4 moles of oxygern B. B) FeCl2 16.0 g B. The compound potassium sulfate has a chemical formula K 2 SO 4 . E) when all of the above occur, A) when a substance reacts with elemental oxygen, Methane gas (CH4), on complete combustion in air, produces: E) none of the above, Vitamin C is known chemically by the name ascorbic acid. B) 102.09 g/mol a) an asteroid with mass $10^6 \mathrm{~kg}$ and speed $500 \mathrm{~m} / \mathrm{s}$, B) 4 moles of hydrogen atoms. A) 3.30 Potassium metal reacts rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of exposure. E) none of the above, How many moles of Pb are in 4.71 1021 Pb atoms? 3.5. E) none of the above, What type of reaction is the generic equation ab+cd=ad+cb C) 1 mole of potassium. C) 74.2 D) 3.11 x 1024 0.0098 mol) was dissolved in acetone(20 ml) followed by addition of potassium carbonate(1.5 g, 0.025 mol), dime-thyl sulfate(1.8 g, 0.0147 mol) at room temperature, fur-ther maintained under reux for 3-4 h, cooled to room temperature and ltered to remove excess potassium car-bonate. B) 3 CHOs Fats and Protein all contain CHO2 What remaining essential element does. What is mass of 0.560 moles of chlorine gas? B) 2NaHCO3 Na2CO3 + CO2 + H2O You have 10.0 g each of sodium, iron, silver, zinc and neon. E) All statements are correct, An empirical formula represents a molecule, The empirical formula of a compound: E) none of the above, A reaction which forms a solid product is an example of a(n): A) 39.10 with 2g oxygen e. 4.8 g oxygen combined with 3.2 g copper and 1.4 g nitrogen f. 28.2 g of an oxide of potassium which contains 23.4 g potassium g. 0.08 mol uranium combined with 3.413 . D) when one substance forms a solid One mole of water contains 1/2 mole of oxygen atoms. B) 1 and 3 only A) 2.33 C) magnesium chloride. A) 0.236 of O2 is: E) none of the above 33) Calculate the molar mass of ammonium carbonate. C) 31.3 C) 2 moles of oxygen atoms. E) none of the above, What is the mass of 1.56 1021 atoms of magnesium in grams? B) the density of hydrogen peroxide. E) none of the above, 18) When the equation __NO2 + __H2O + __O2 __HNO3 is balanced, the coefficient of HNO3 is: A) synthesis/combination D) 12 How many grams of ore are needed to obtain of Fe? D) 0.974 10.Convert 1.06 x 10^23 formula units of CuSO3 to moles. D) indicates the simplest ratio of atoms in the compound. A) 2.64 1026 B) heat E) none of the above, Given that sodium chloride is 39.0% sodium by mass, how many grams of sodium chloride are needed to have 950 mg of Na present? B) decomposition C) C3H6O2 The pH of pure water at 37C37^{\circ} \mathrm{C}37C is 6.806.806.80. C) H+ + OH- H2O If 2.01 1023 atoms of an element from Group IA of the periodic table has a mass of 7.675 grams, this element is most likely. contains 6.02 x 1022 molecules O It contains one sulfur atom none of the answers are correct. B) CH2O E) none of the above, What is the molecular equation for the reaction of hydrochloric acid with potassium hydroxide? 1 mole of N2 contains 12.0441024 N molecules. E) none of the above, The mass of 1 mole of magnesium is greater than the mass of 1 mole of carbon, Which of the following contains 9.02 1023 atoms? Q. how many moles of fluorine are in 3.2 moles of xenon hexafluoride? D) double-displacement E) none of the above, What is the mass percent of Na in sodium chloride? C) single displacement This implies gram equivalent wt. E) All the above ions are in the net ionic equation. C) O2- $5 Load your coursepivot wallet using PayPal or cards and purchase this answer to view it. Nanoscale graphene-based materials (GBMs) enable targeting subcellular structures of the nervous system, a feature crucial for the successful engineering of alternative nanocarriers to deliver drugs and to treat neurodisorders. E) none of the above, A reaction in which a substance reacts with oxygen, emitting heat and forming oxygen-containing compounds is an example of a(n): How many moles of cations are in 1.45 mol K2SO4? . 3.5 A) 93.7 B) 13.3 E) none of the above, What is the mass of 3.09 1024 atoms of sulfur in grams? Which compound would not form ions in the complete ionic equation? C) 39.3 1. D) All of A, B, and C. E) None of A, B, and C. 32) One mole of potassium sulfate contains: A) 4 moles of oxygen. B) 9.00 g H2O D) light C) 7 E) none of the above. What is the most likely empirical formula for this compound? A) 2, 1, 1, 3 E) none of the above, When the equation, ___O2 + ___C5H12 ___CO2 + ___H2O is balanced, the coefficient: B) The helium balloon has more atoms. A 42.7 gram sample of potassium nitrate contains how many grams of potassium? A) 5.87 1023 A) 2, 1, 1, 2 A. C) 5, 2, 2, 1 A mole is defined as the amount of substance containing the same number of discrete entities (atoms, molecules, ions, etc.) How many moles of chloride ions are in the solution? E) none of the above, Calculate the molar mass of calcium nitrate. 2003-2022 Chegg Inc. All rights reserved. An iron ore sample is found to be 35.00% Fe by mass. B) 15.6 A) 34.02 D) 350.0 ___O2 + ___CH4 ___CO2 + ___H2O C ) 26.7. The sub script shows us that in one more molecule we have two moles of potassium to buy by the volume of the solution . D) 32.0 g O2 D) NH4Cl. D) 8 10 grams Potassium Sulfate to mol = 0.05739 mol. E) none of the above, Determine the empirical formula of a compound containing 60.3% magnesium and 39.7% oxygen. PUGVIEW FETCH ERROR: 403 Forbidden National Center for Biotechnology Information 8600 Rockville Pike, Bethesda, MD, 20894 USA Contact Policies FOIA HHS Vulnerability Disclosure National Library of Medicine National Institutes of Health E) none of the above, The chemical formula CH2O can be classified as: A) 39.1 C) 0.555 D) 4, In writing the chemical equation for a precipitation reaction, what abbreviation of the physical state must appear with one of the products? E) none of the above, Which of the following compounds has the highest mass percent of "O"? 3.5. What is the formula of the oxide? C) Ag2O E) none of the above, How many atoms are in 15.6 grams of silicon? The compound potassium sulfate has a chemical formula K 2 SO 4 . HOw many moles of carbon are in 3.5 moles of calcium carbonate ? A) Mg2+(aq) + 2Cl-(aq) + 2Ag+(aq) + 2NO3- (aq) Mg2+(aq) + 2NO3-aq) + 2AgCl(s) Calculate the molar mass of ammonium carbonate. D) C2H2O4 C) 35.1 B) C3H21 E) none of the above, A 15.5 gram sample of diphosphorous pentoxide contains how many grams of phosphorous? as the number of atoms in a sample of pure 12C weighing exactly 12 g. One Latin connotation for the word "mole" is "large mass" or "bulk," which is consistent with its use as the name for this unit. A) 136.03 g/mol What is the molar mass of aluminum sulfate? B) 2.09 1025 Considering the following precipitation reaction: B) 3.5 E) All of the statements are true. D) 20 E) All the above ions are in the complete ionic equation. 1 mole of N2 contains 6.0221023 N2 molecules. Potassium Sulfate molecular weight Molar mass of K2SO4 = 174.2592 g/mol Convert grams Potassium Sulfate to moles or moles Potassium Sulfate to grams Molecular weight calculation: 39.0983*2 + 32.065 + 15.9994*4 Percent composition by element Calculate the molecular weight of a chemical compound Enter a chemical formula: B) H2O2 In the first step of this process, the hydrogen sulfide is burned to obtain sulfur dioxide, SO2. A) synthesis/combination Calculate the molar mass of calcium nitrate. A) 0.250 A) The mass of 1 mole of carbon is greater than the mass of 1 mole of magnesium. 2 moles of sulfur C. 1 mole of potassium D. 3 moles of potassium E. none of the above 2. Given the following percent composition, what is the molecular formula? Tags: C) C3H6O3 The molarity is equal to the number of moles of permanganate divided by the volume of solution. B) C E) none of the above, A reaction which forms a gaseous product is an example of a(n)________. B) 1.05 1025 One mole of boron has a mass of ________ g. One mole of oxygen gas has a mass of ________ g. What is the mass in grams of 5.40 moles of lithium? E) none of the above, If a sample of carbon dioxide contains 3.8 moles of oxygen atoms, how many moles of carbon dioxide are in the sample? 2003-2022 Chegg Inc. All rights reserved. E) Cr3O2, An iron chloride compound contains 55.85 grams of iron and 106.5 grams of chlorine. One mole of potassium sulfate (K2S04) contains: A. E) All of the above statements are true. What is the mass of 0.560 moles of chlorine gas? E) none of the above, What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution? n-factor=basicity of acid=1 (here) [Since HNO3 can give only one hydrogen ion.] C) 1.62 x 1024 B) emission of heat when chemicals are contacted with each other E) Fe3Cl, A 7.96 gram sample of silver reacts with oxygen to form 8.55 gram of the metal oxide. What is the molar mass of aluminum sulfate? A) MgO What is the mass percent of chlorine in hydrochloric acid? What does one mole of potassium sulfate contain? D) aluminum sulfate A) AgO E) All of the statements are true. 3. Which of the following is NOT typically a sign of a chemical reaction? A) C3H4O3 A) precipitation B) CHO2 D) The molecular formula can be the same as the empirical formula in some situations. A) 58.4 A) 2, 1, 3, 1 D) barium chloride. D) 4.06 1023 C) No precipitate has formed. C) NO3- B) 2.84 1045 Considering the following precipitation reaction: one sulfur atom four oxygen atoms you get that from the 4 subscript. C) 0.142 You have 10.0 g each of Na, C, Pb, Cu and Ne. The empirical formula for this compound is: E) none of the above, What is the mass of 3.91 x 1024 sulfur atoms? D) H6O What is the mass of 3.09 1024 atoms of sulfur in grams? 3. E) Ne, How many moles of iron are contained in 1.75 kg of iron? Science Chemistry Chemistry questions and answers 13) One mole of potassium sulfate contains: 13) A) 4 moles of oxygen. Which contains the. E) none of the above, 20) Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas. What is the mass percent of iron in the ore? 3.0 moles N20s C. 12.0 moles silver D. 3.0 moles water 6. D) (w) D) Cl-(aq) + Ag+(aq) AgCl(s) B) 9.91 1025 C) 96.09 g/mol 2.5L of 1M K 2SO 4 contains (2 2.5) that is 5 moles of Potassium ions. Add an answer. Find the amount (mol) of one substance from the volume and molarity. E) none of the above. A) 2 moles of nitrogen atoms. B) 2, 2, 1, 2 E) none of the above A) 22.4 E) none of the above, Bauxite is an ore that contains the element aluminum. B) A complete ionic equation is a chemical equation showing all of the species as they are actually present in solution. In order to find the volume I can write, I have to substitute the value for the number of moles. D) 3 moles of potassium E) none of the above 14) 14) The oxygen-to-hydrogen mass ratio of water is always 80 is an example of what fundamental law? B) 4 moles of oxygen Calculate the molar mass of ammonium carbonate. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Potassium sulfate | K2SO4 - PubChem Apologies, we are having some trouble retrieving data from our servers. C) 19.0 C) 2 and 3 only Explanation: Here, we use the mole as we would use any other collective number: a dozen eggs; a Bakers' dozen; a Botany Bay dozen. c. It has a molar mass of 174.3g.. potassium sulfate is an excellent source of potassium for plants potassium chloride, potassium sulfate and potassium nitrate are used in agriculture, horticulture and hydroponics potassium sulphate (k2so4) is a non-flammable white crystalline salt which is soluble in water sulfate compounds are salts or esters of sulfuric acid formed by replacing A large beaker contains 1.50 L of a 2.00 M iron(III) chloride solution. E) none of the above D ) 4 moles of oxygen . B) C3H e) a proton with a mass of $2 \cdot 10^{-27} \mathrm{~kg}$ and a speed of $2 \cdot 10^8 \mathrm{~m} / \mathrm{s}$. E) none of the above, Determine the correct empirical formula of a compound containing 26.68% carbon, 2.24% hydrogen, and 71.08% oxygen. An airplane traveling at $510 \mathrm{~km} / \mathrm{h}$ needs to reverse its course. E) none of the above, How many hydrogen atoms are in 35.0 grams of hydrogen gas? E) no reaction, Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite? A) C4H14 One mole is defined as the amount of substance that contains as many particles as the number of atoms in exactly 12 g of carbon-12, which is 6.02 10 23 particles. D) 1 mole of nitrogen. 2. Which of the following contains 9.02 1023 atoms? Calculate the molar mass of ammonium carbonate. B) 0.371 C) 6 2H2S(g)+3O2(g)2H2O(l)+2SO2(g);H=1124kJ The density of sulfur dioxide at 25C and 1.00 atm is 2.62 g/L, and the molar heat capacity is 30.2 J/(mol C). Calculate KwK_{\mathrm{w}}Kw, pOH\mathrm{pOH}pOH, and [OH]\left[\mathrm{OH}^{-}\right][OH]at this temperature. B) 60.7 D) gas evolution reaction A) 3 C) emission of light when chemicals are contacted with each other C) 10 E) none of the above, 19) Which of the following equations is NOT balanced properly? ___HCl + ___Mg ___MgCl2 + ___H2 E) None of 1, 2, and 3, What type of a reaction occurs when potassium metal reacts with fluorine gas? C) 32.00 How many hydrogen atoms are in 35.0 grams of hydrogen gas? B) CH2O D) All of 1, 2, and 3 2. Pb(NO3)2(aq) + 2KI(aq) PbI2(s) + 2KNO3(aq) 12.8. B) 88.8 indicates the simplest ratio of atoms in the compound, The simplest formula for hydrogen peroxide is HO. A) Na B) 0.303 A) potassium acetate E) none of the above, What is the mass (in grams) of 1.95 moles of water ? D) 1, 1, 1, 1 Two moles of potassium can be converted by dividing the mass of the pot by the mass of the pot. B) 2 50 grams Potassium Sulfate to mol = 0.28693 mol. A) 2 moles of nitrogen atoms. A) 9.64 1022 D) 3 moles of potassium. What is the molar mass of aluminum sulfate? D) Sodium chloride is insoluble in water. To this solution, methyl vinyl ketone (1.5 mmol) followed by 20 mol % of PdCl2 (59-60%, 35 mg) was added under a nitrogen atmosphere, then . 1.69 C. 6.76 D. 13.5 E. none of the above 5. C) 2.7 x 1024 A) Na + H2O NaOH (aq) + H (g) C) 3.01 103 C) 2 moles of oxygen atoms. Which of the following statements about empirical formulas is incorrect? E) none of the above, Bananas cost 33 per pound. You now add 0.500 L of a 4.00 M lead(II) nitrate solution to the beaker. E) none of the above, What is the mass percent of carbon in oxalic acid, H2C2O4? B) 3.13 10-4 D) Na22+ Which contains the largest number of moles? 22.4. 30 seconds . A) 1297 This means that when you dissolve one mole of sodium chloride in water, you will get one mole of aqueous sodium cations and one mole of aqueous chloride anions. Which of the following statements about balancing reactions is FALSE? A) 22.99 Which of the following statements is FALSE? How many moles of carbon are in 3.5 moles of calcium carbonate? D) 16 B) 0.0630 A) One mole of atoms makes up an amount of atoms that can be seen with the naked eye. (a)(a)(a) What is the total charge on the sphere? D ) 11.2. How many atoms are in 1.50 moles of fluorine gas? D) 6.658 g/mol D) 1.05 1025 C) single displacement Calculate the molarity if a flask contains 1.54 moles of potassium sulfate in 125 ml of solution..? For one more of neon, 2 times 10 to Which of the following compounds has the highest mass percent of "O"? For acids we define their basicity as the n factor i.e. D) N4H4 D) gas evolution reaction. A) 4.97 1025 A) magnesium phosphate VIDEO ANSWER: We are going to use the most small masks and elegant dress number to solve the given question. Expert Answer 100% (1 rating) 1 mol of CuSO4 contains 6.0221 View the full answer Previous question Next question B) 10.02 g/mol Molecular weight of Potassium Potassium molecular weight Molar mass of K = 39.0983 g/mol Convert grams Potassium to moles or moles Potassium to grams Percent composition by element Calculate the molecular weight of a chemical compound Enter a chemical formula: Browse the list of common chemical compounds. A) describes the mass relationships in a molecule. d) a $10-\mathrm{kg}$ cannonball with a speed of $120 \mathrm{~m} / \mathrm{s}$, Given the following percent composition, what is the molecular formula? 5. C) 21.4 C) 26.7 D) I- A) the properties of hydrogen peroxide. Rank the following objects from highest to lowest in terms of momentum and from highest to lowest in terms of energy. C) Pb One mole of ammonium nitrite contains: 40% C, 6.7% H, 53.3% O. D) C6H12O6 Thus, 2.5L of 0.200M K 2SO 4 contains (2 2.5 0.200) that is 1 mole of Potassium ions E) All of the above are signs of a chemical reaction. In one roll, we have one mole of chloride. A) CHO History. C) C2H4O2 E) none of the above, A compound composed of only carbon and hydrogen is 25.2% hydrogen by mass. \text{$\mathrm{SO}_2 \mathrm{Cl}_2+\mathrm{HI} \longrightarrow \mathrm{H}_2 \mathrm{~S}+\mathrm{H}_2 \mathrm{O}+\mathrm{HCl}+\mathrm{I}_2$} C) precipitation reaction. E) none of the above, What are the coefficients for the following reaction when it is properly balanced? Pb(NO3)2(aq) + 2KI(aq) PbI2(s) + 2KNO3(aq) A compound has a molar mass of 180.15 g/mol. C) C2H7 Balance the below equation by inspection : E) none of the above, What are the coefficients for the following reaction when it is properly balanced? If she inhales and exhales 16 times per minute at sea level, where the temperature is 59F^{\circ}FF (15C^{\circ}CC) and the pressure is 14.7 psia (101 kPa), what would you expect her rate of breathing at 18,000 ft (5486 m) to be? B) 2.70 x 1024 how many mole of fluorine are in 3.2 moles of xenon hexafluoride ? C) oxidation-reduction C) 2,430 How many grams of ore are needed to obtain 454g of Fe? B) When coefficients are added the type of compounds is changed in the chemical reaction. C) 5.60 D) C3H9O4 B) The mass of 1 mole of magnesium is greater than the mass of 1 mole of carbon. E) none of the above, How many atoms of lithium are in 18.7 g? Given the following percent composition, calculate the molecular formula: 39.99% C, 6.73% H, 53.28% O. If you obtained 108 grams of aluminum from an ore sample that initially weighed 204 grams, what is the mass percent of aluminum in this bauxite ore? A) synthesis/combination E) none of the above, What are the coefficients for the following reaction when it is properly balanced? Is this evidence of a chemical reaction? E) none of the above. E) none of the above, Which of the following is already in its empirical formula? E) none of the above, How many atoms are present in 4.5 moles? Which of the following statements about writing molecular, complete and net ionic equations is FALSE? A) SO42- C) 28.0 g N2 Determine the empirical formula of ascorbic acid if it is composed of 40.92% carbon, 4.58% hydrogen, and 54.50% oxygen. In chemistry, we use the unit 'mole' to represent the amount of substance containing 6.02 10 23 particles. B) 25.8 D) 1, 1, 2, 2, 17) When the equation __Ca3N2 + __H2O __Ca(OH)2 + __NH3 is balanced, the coefficient of H2O is: Hence, 1 mol of the same contains 2 mol of potassium, 1 mol of sulfur and 4 mol of oxygen. 96.09 g/mol What is the percent by mass of oxygen in water? 33) Calculate the molar mass of ammonium carbonate . One mole of potassium sulfate contains: 4 moles of oxygen. E) none of the above, How many moles of bromine gas are in 37.7 grams? C) A net ionic equation is an equation showing only the species that actually participate in the reaction. A) MnO A) C2H3O2 D) absorbing light when chemicals are contacted with each other In one roll, we have one mole of chloride. A) KO = Molecular mass/n-factor So we have molecular mass of HNO3 =1+14+ (163) =63 Now let us talk about the n factor. Like any equilibrium constant, KwK_wKw changes with temperature. ___potassium iodide + ___lead (II) acetate ___lead (II) iodide +___potassium acetate A) 2.44 These drain into \_\_\_\_\_\_\_\_\_\_ ducts that converge toward the nipple. Which of the following contains the least number of atoms? A) precipitation Purchase this answer to view it. D) gas evolution reaction. The symbol of mole is mol. B) aluminum sulfide It was also known as vitriolic tartar and Glaser's salt or sal polychrestum Glaseri after the pharmaceutical chemist Christopher Glaser . We reviewed their content and use your feedback to keep the quality high. E) none of the above, 60) A redox reaction has occurred ________. Tags: Question 18 . E) none of the above, What type of reaction is the generic equation a+b=ab C) HO 96.09 g/mol. If you obtained 108 grams of aluminum from an ore sample that initially weighed 204 grams, what is the mass percent of aluminum in this bauxite ore? A) No, boiling water is a physical change. A) 37.1 And for part a your told K C L cost 55 cents per kilogram and we're supposed to find for what price of potassium sulfate could supply the same amount of potassium on the same price basis. C) 19.2 I wish to bye then. D) Coefficients are added to compounds to ensure both sides of the reaction have equal numbers of each atom. B) 1 and 3 only B) AgO2 C) FeCl3. E) none of the above, A compound has a molar mass of 180.18 g/mol. We'll do it for the next one. E) none of the above, The mass of one mole of carbon dioxide is ________ g. C) Subscripts are multiplied by the coefficients to determine the number of atoms in a compound. D) Cr2O3 Determine the empirical formula of a compound containing 83% potassium and 17.0% oxygen. Find the electric field at the following distances from the sphere's center: Assume that a woman must breathe a constant mass rate of air to maintain her metabolic processes. I hope this solved your question. D) Mg2O B) acid-base neutralization D) aluminum sulfide Calculate the mass of one mol of oxygen gas. C) The neon balloon has more atoms. ___nitrogen monoxide + ___carbon monoxide ___nitrogen +___carbon dioxide It was first isolated from potash, the ashes of plants, from which its name . D) Sodium chloride is insoluble in water. D) C2H8 In one mole of. A 42.7 gram sample of potassium nitrate contains how many grams of potassium ? D) 3 moles of potassium E) none of the above 14) 14) The oxygen-to-hydrogen mass ratio of water is always 80 is an example of what fundamental law? C) magnesium bromide B) acid-base neutralization B) 384.4 B) combustion reaction. Calculate the molar mass of calcium nitrate. A) 2.14 x 1024 E) none of the above, 16) What are the coefficients for the following reaction when it is properly balanced? The concentration for the chloride is the same as before. C) 295.1 C) Mg2+(aq) + 2NO3-(aq) Mg(NO3)2(aq) A) CH 0.25 How many moles of fluorine are in 3.2 moles of xenon hexafluoride? B) 158.9 A) 52.9 A) 2Cr + 6HCl 2CrCl3 + 3H2 D) 47.1 D) emission of light when chemicals are contact with each other A) An empirical formula represents a molecule. Coefficients are added to compounds to ensure both sides of the reaction have equal numbers of each atom. C) 2, 2, 2, 1 C) 1, 3, 2, 1 Zn(s) + Cu2+(aq) Zn2+(aq) + Cu(s) B) KNO3 Which equation below best describes the balanced equation for this reaction? D) 44.01 E) none of the above, What is the mass percent of hydrogen in water? 32) One mole of potassium sulfate contains: A) 4 moles of oxygen. C) 3, 2, 2, 1 C) Mn2O3 D) 9 C) K2O3 When two sparingly soluble salts B) 278.0 g/mol Pb(NO3)2(aq) + 2KI(aq) PbI2(s) + 2KNO3(aq) The answer is 1 mole potassium chlorate. C) 2 moles of nitrogen. What is the mass percent of carbon in oxalic acid, H2C2O4? E) Cs. D) C6H12O6 A) 0.2 A) color change when chemicals are contacted with each other D) H2 (g) 2. A) 2, 1, 1, 1 96.09 g/mol. Select appropriate equivalent molar ratio. B) Mg2+(aq) + 2Cl-(aq) + 2Ag+(aq) + 2NO3- (aq) Mg(NO3)2 (aq) + 2 AgCl(s) D) C3H4O3 B) combustion reaction. How many moles of Cu are in 1.48 1025 Cu atoms? 2 Na(s) + Cl2(aq) 2NaCl(s) E) none of the above, Which of the following statements about empirical formulas is incorrect? D) 3 moles of potassium. C) 3.76 1027 B) 0.472 $$, Give an example of a molecule or ion having a formula of each of the following types and structures. Calculate the mass of one mol of oxygen gas. E) none of the above, ) What type of a reaction occurs when a potassium nitrate solution is mixed with a barium acetate solution? C) Mg2O3 E) none of the above, An unknown acid has a molar mass of 60.06 g/mol. 1. C) 132.10 g/mol If 2.01 atoms of an element from Group IA of the periodic table has a mass of 7.675 grams, this element is most likely: B) an ionic compound with water dissolved in it. The sub script shows us that in one more molecule we have two moles of potassium to buy by the volume of the solution . D) Ag3O Determine the empirical formula of ascorbic acid if it is composed of 40.92% carbon, 4.58% hydrogen, and 54.50% oxygen. E) none of the above, Determine the empirical formula of a compound containing 83% potassium and 17.0% oxygen. D) 70.1 So four So first for KCIA. C) empirical, possibly molecular. See Answer One mole of copper (II) sulfate, CuSO4 , contains ________ O atoms. B) 2, 3, 2, 2 1000 grams Potassium Sulfate to mol = 5.73858 mol. Vitamin C is known chemically by the name ascorbic acid. What would the empirical formula be for the molecular compound C6H9O4? B) 12.8 A) acid-base reaction. What is the most likely empirical formula of this compound? A) absorbing heat when chemicals are contacted with each other Gram equivalent wt. C) 0.429 A) 2.8 B) 16.5 C) 3 D) KI B) is the same as the molecular formula. D) gas evolution B) 2 moles of oxygen. E) none of the above, What would the empirical formula be for the molecular compound C6H9O4? A) oxidation-reduction reaction. You have 10.0 g each of Na, C, Pb, Cu and Ne. What is the value of n necessary to find the molecular formula? D) 164.10 g/mol Which contains the largest number of moles? How many moles of Cu are in 1.48 1025 Cu atoms? C) The mass of 1 mole of carbon is the same as the mass of 1 mole of magnesium. A. C) 306.2 g/mol Answer : One mole of copper (II)sulfate contains number of oxygen atoms. B) lithium carbonate B) acid-base neutralization A) 4.25 1025 D) 3.00 a. 3.38 B. In comparing a balloon containing 25 grams of helium to a balloon containing 25 grams of neon, which one of the following statements is TRUE? Calculate the mass of one mol of oxygen gas. E) none of the above, 23) Which of the following compounds is INSOLUBLE? This is equal to the weight of 20. B) 88.05 g/mol 1 mole of ferric sulfate contains 2 moles of iron, and 12 moles of oxygen atoms, and three moles of sulfate ions. E) none of the above. C) CH4 C) 0.761 "Normalizing" the two given values to those dimensions we obtain the answer. 342.2 g/mol. E) none of the above, What is the mass percent of chlorine in hydrochloric acid? Two moles of potassium can be converted by dividing the mass of the pot by the mass of the pot. With potassium-t-butoxide In 1-methyl-pyrrolidin-2-one at 25; for 4h; 79%: With potassium-t-butoxide In 1-methyl-pyrrolidin-2-one at 20; for 4h; . A) A molecular equation is a chemical equation showing the complete, neutral formulas for every compound in a reaction. D) Yes, the formation of a gas is proof a new compound has been made. C) An empirical formula must be multiplied by an integer to obtain the molecular formula. 4. Answer: D, 21) An aqueous solution is: D) Cu Mass of water = 18 g/mol. C) N2H6 Which contains the smallest number of moles? Hence, 1 mol of the same contains 2 mol of potassium, 1 mol of sulfur and 4 mol of oxygen. One mole of potassium sulfate contains: Replies Answer accepted by topic starter Solved In the gas phase one mole of N2 and three moles of H2 react to form two moles of NH3? A) 4.00 g H2 D) 32.6 D) C5H12O2 A) molecular only. B) 7.33 1023 A 15.5 gram sample of diphosphorous pentoxide contains how many grams of phosphorous? Be notified when an answer is posted. A) 221 E) none of the above, What is the mass (in grams) of 3.03 1024 molecules of carbon dioxide molecules? E) none of the above, A compound composed of only hydrogen and oxygen is 5.94% hydrogen by mass. Solution : As we know that, 1 mole of contains number of atoms. What is the correct value for Avogadro's number? Firstly, We must learn how to identify a mole that could potentially be cancerous. B) 3 164.10 g/mol. B) empirical only. 13) One mole of potassium sulfate contains: 13) A) 4 moles of oxygen. C) 165 C) Cr2(SO4)3 + 6KOH 2Cr(OH)3 + 3 K2SO4 A) 1 and 2 only B) CH3O2 A) oxidation-reduction reaction D) 2, 1, 1, 2 D) C2H14 D) 79.9 B) 1 [edit | edit source] Another way of saying the same thing is to use the term 'Molar mass' . C) 51.6 A) 3.38 What is the correct value for Avogadro's number? You have 10.0 g each of sodium, iron, silver, zinc and neon. Table 1 Ground state reactions employed in the . Convert moles given to moles desired substance. 1.0 mole C6H14 B. 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