Molar Mass exam with 100% Correct answers already graded A+

Find the molar mass of glucose? (C6 H12 O6) 6X12.01=72.06 12X1.01=12.12 6X16=96 =180.18g Find the molar mass of Al2 (SO4)3 2X26.98=53.96 3X32.07=96.21 12X16=192 = 342.17g Find the molar mass of Ba (NO3)2 1X137.33=137.33 2X14.01=28.02 6X16=96 = 261.35g Find the percentage of Oxygen in KClO3 1X39.10=39.10 48/122.55X100 1X35.45=35.45 3X16=48 =39.2% Molar mass= 122.55g Find the percentage of water in MgCl2 X 6H20 1X24.31=24.31 108.12/203.33X100 2X35.45=70.9 6X18.02=108.12 =53.2% Molar mass=203.33g Find the percentage of Hydrogen in water? 2X1.01=2.02 2.02/18.02X100 1X16=16 Molar mass=18.02 g =11.2% Covert to moles 289.3g KNO3 1X39.10=39.10 289.3gKNO3|Mol 1X14.01=14.01 | 101.11g 3X16=48 =101.11g = 2.861mol KNO3 Convert to moles 467.4g CuCN 1X63.55=63.55 467.4gCuCN|Mol 1X12.01=12.01 |89.57g 1X14.01=14.01 =89.57g = 5.218 mol CuCN Convert to grams 14.6 mol Na2 SO4 2X22.99=45.98 14.6molNa2 SO4 | 142.05g 1X32.07=32.07 |mol 4X16=64 =142.05g = 2.07X10^3g how many oxygen atoms does this have? 15.7 mol CO2 15.7mol CO2|6.02X10^23 cmpds|2 o atoms | mol |cmpds =189.028X10^23 o atoms =1.89X10^25 o atoms how many total atoms does this have? 58.5 g FeO 58.5 g FeO | mol | 6.02X10^23 cmpds | 2 atoms | 71.85g|mol | cmpds =9.80X10^23 atoms The 71.85g is the molar mass of FeO define empirical formula? simple whole number ratio of all elements Find the empirical formula of 63.52g Fe 36.48g S 63.52g|mol = 1.14 mol/1.14 mol |55.85g 36.48g|mol |32.07g = 1.14 mol/1.14mol Fes Find the empirical formula of 40.0% C, 6.71% H, and 53.29% O 40.0g|mol = 3.3 mol/3.3 mol | 12.01g 6.71g|mol =6.7 mol/3.3 mol |1.01g 53.29g|mol = 3.3 mol/3.3 mol |16g CH2O define molecular formulas? actual formulas; multiples of empirical formulas If the molecular mass is 26 than what is the molecular formula of CH? 26/13=2 C2H2 If the molecular mass is 78 than what is the molecular formula of CH? 78/13=6