Question

How many moles are there in 20.0 grams of Al₂(CO₃)₃

Answer 1

The number of moles can be calculated using the following equation:

n(Al₂(CO₃)₃) = m(Al₂(CO₃)₃) / Mr(Al₂(CO₃)₃)

where n - number of moles, m - mass, Mr - molecular weight.

From here:

n(Al₂(CO₃)₃) = 20.0 g / 234 g/mol = 0.085 mol

Answer: 0.085 mol