Question

Determine the mass of each of the following: 3.3 × 10ˉ² mol Na₂CO₃

Answer 1

3.498 grams

Step-by-step explanation:

First, find the Molecular weight of Na2CO3:

Na2CO3 = (2×23) + 12 + (16×3)

= 46 + 12 + 48

= 106 g/mol

Second, input the known molecular weight of Na2CO3 and number of moles into the following formula:

Mass (g) = number of moles × molecular weight (Mr)

g = 3.3 × 10‐² mol × 106 g/mol

g = 3.498 or 3.5 grams

Hope it helps. Thanks!