Chemistry 122 d

Question

Calculate the number of moles in 10.0 g ammonia

Answer 1

Hello Chloe. First, we need to know that the chemical formula for ammonia is NH₃. Then the molar mass of ammonia must be calculated.

N 1 x 14.007 g/mol = 14.007 g/mol

H 3 x 1.008 g/mol = 3.024 g/mol

Molar mass of NH₃ = 14.007 g/mol + 3.024 g/mol = 17.031 g/mol

Now the 10.0 grams of ammonia given in the problem can be divided by the molar mass of ammonia to attain the number of moles.

10.0g / 17.031 g/mol = 0.587 moles of ammonia