please help with 10& 12 asap tps://eagleonline.hccs.edu/courses/61048/pages/form

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please help with 10& 12 asap

tps://eagleonline.hccs.edu/courses/61048/pages/formula-mass-an d-the-mole-concept?module item id-2003865 MyLab & Mastering HCC EAGLE ONLINE M Gmail 8. Compare 1 mole of H2, 1 mole of O2, and 1 mole of F2 a. Which has the largest number of molecules? Explain why. b. Which has the greatest mass? Explain why. 9. Which contains the greatest mass of oxygen: 0.75 mol of ethanol (C2HsOH), 0.60 mol of formic acid (HCO2H), or 1.0 mol of water (H,O)? Explain why 10. which contains th greatest number of moles of oxygen atoms: 1 m of ethanol C2HsOH), 1 mol of formic acid (2H), or 1 mol of water H2O)? Explain why 11. How are the molecular mass and the molar mass of a compound similar and how are they different? 12. Calculate the molar mass of each of the following compounds a. hydrogen fluoride, HF b. ammonia, NH3 c. nitric acid, HNO3 d. silver sulfate, Ag2SO4 e. boric acid, B(OH)3 13. Calculate the molar mass of each of the following b. CsH12 c. Sc2(SO4)s d. CH3COCH3 (acetone) e. CsH1206 (glucose) 14. Calculate the empirical or mole cular formula mass and the molar mass of each of the following minerals: a. limestone, CaCO3 b. halite, NaCI c beryl, BeaAl2SiO1 d. malachite, Cu2lOH)2CO3 e. turquoise, CuAl&(PO4)4(OH)B(H20)4

Explanation / Answer

10. Formic acid has the greatest number of moles of oxygen atoms because it has 2 atoms of O in each molecule. The others have only 1 atom of O in each molecule.

12. HF MOLAR MASS = 20.01 ( 1+ 18.99)

       NH3 = 17 g/mol ( 14+3(1))= 17

      HNO3 = 63.01 g/mol ( 1+14+3(16))= 1+14+48=63

    Ag2SO4 = 311.7    ( 2(107.8 )+ 32+4(16)) = 215.6+32+64 = 311.6

B(OH)3 = 61.8 g/mol ( 10.8+3(16)+3(1))= 10.8+48+3= 61.8

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