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Chapter 4 Quiz 2

Chapter 4 Quiz 2

Q 1.What is the molar mass of P4O10 to 5 significant figures? 2.What is the molar mass of (NH4)2S to 4 significant figures? 3.How many grams of biotin (C10H16N2O3S) are in 3 moles? 4.How many molecules are in 137g of the B vitamin Nicotinamide. (C6H6N2O)? 5.How many grams of glucose (C6H12O6) are consumed if 15.6 ml of water are produced? (density = 1.00 g/ml) C6H12O6 + 6O2 -> 6H2O + 6CO2

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1. 283.89 g/mole 2. 68.15 g/mole 3. 733.0 4. 6.76 x 1023 molecules 5. 26.0 g