Question

The mass of a carbon atom is 1.994 × 10-23 grams. The mass of a hydrogen atom is 1.67 × 10-24 grams. What is the difference of their masses? ( scientific notation)
0.324 × 10-24 grams
1.827 × 10-23 grams
1.827 × 10-24 grams
0.324 × 10-23 grams

Answer 1

Solving:
$1.994*10^{-23}\:-\:1.67*10^{-24} =$
$(1.994 - 0.167 )*10^{-23}$
$\boxed{\boxed{1.827*10^{-23}\:grams}}\end{array}}\qquad\quad\checkmark$