Question

What is the mass of 6.12 moles of arsenic (As)?

Answer 1

Answer: D. 459g As

Explanation:

                    1 mole of Arsenic = 74.9216 grams

Therefore  6.12 moles of arsenic = x grams

Cross multiply to get the value of x

 x = 74.9216 x 6.12

 x = 458.8g ≈ 459g

               x = 459g As

Answer 2

The answer is D. 459 g As