Question

The mass of 2 grams of atoms of calcium is :

(relative atomic mass=40)

• A. 2 g
• B. 0.05 g
• C. 0.5 g
• D. 80 g

Answer 1

The correct option is D 80 g

As we know,

$1$ mole= $1$ gram atom= Molar mass

$1$ gram atom of Calcium= $40gm$

So, $2$ gram atom= $2\times 40=80$ gram

Hence the correct option is D.