Question

PLEASE HELPPP ME

Use the following balanced chemcial equation to answer the question below.

CaBr2 + Na2SO4 --> CaSO4 + 2NaBr

1. How many moles of sodium bromide can be made from 5 moles of calcium bromide

2. How many grams of calcium sulfate will be made from 2.00 moles of calcium bromide

3. How many grams of calcium bromide will be needed to make 845 grams of calcium sulfate

Answer 1

How many miles is in 2NA

Answer 2

1) (5 moles of calcium bromide) x 2 / 1 = 10 moles

2) (2.00 moles of calcium bromide) = 2.00 moles of calcium sulfate

so (2.00) x (136.1 g/mol) = 272.2 g

3) (845 grams of calcium sulfate) / 136.14 g/mol = 6.21 moles

6.21 moles of calcium sulfate = 6.21 moles of calcium bromide

(6.21 moles of calcium bromide) x 199.89 g/mol = 1241.32 g