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Calculate the mass in grams for the following: (a) 0.6 mol of hydrogen peroxide. (b) 0.15 mol 0f ammonia gas |
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Answer» Number of moles = mass / molar mass (a) 0.6 mol of hydrogen PEROXIDE :- Hydrogen peroxide => H2O2 Number of moles = 0.6 Mass = ? Molar mass of Hydrogen = 1 g/mol Molar mass of Oxygen = 16 g/mol Molar mass of H2O2 = 1*2 + 16*2 = 2 + 32 = 34 g/mol 0.6 = mass / 34 mass of H2O2 = 34*0.6 = 20.4 g (b) 0.15 mol 0f AMMONIA gas : Ammonia => NH3 Number of moles = 0.15 Mass = ? Molar mass of Hydrogen = 1 g/mol Molar mass of NITROGEN = 28 g/mol Molar mass of NH3 = 28 + 1*3 = 31 g/mol 0.15 = mass / 31 mass of NH3 = 31*0.15 = 4.65 g :-) |
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