2. Find the number of moles in each of the following (make sure your formula is...
2.
Find the number of moles in each of the following (make sure your formula is correct):
a. 3.75 g of aluminum hydroxide
3.
Find the mass in grams for each of the following:
a. 4.86 moles of B2O3
Homework Answers
2. The number of moles is given by the equation:
number of moles = mass/molar mass
Mass = 3.75g
Molar mass of Al(OH)3 = 78g/mol
moles = 3.75g/78g/mol = 0.048 moles
3. Mass of 4.86moles of B2O3
mass= moles x molar mass
Molar mass of B2O3 = 69.63g/mol
mass= 4.86moles x 69.63g/moles = 338.40g
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