Question

Which of the following BEST represents 3.0 moles of an element?

Select one answer
А
2.02 grams of H
B
14 grams of N
C
4 grams of He
D
27 grams of Be

Answer 1

Answer: D: Berylium, Be

Step-by-step explanation:

The atomic mass of Be is 9.0. This is also it's molar mass (9 grams/mole). 3 moles of Be would therefore be (3 moles)*(9 grams/mole) = 27 grams.

That's what D (27 g of Be) offers as an answer.