Question

If the mass of a proton is 2.34 × 10–14 grams, what is the mass of 1,000 protons?

2.34 × 10–11 g


2.34 × 10–13 g


2.34 × 10–12 g


2.34 × 10–17 g

Answer 1

masse of 1 proton: = 2.34 x 10⁻¹⁴

masse of 1000 protons = 2.34 x 10⁻¹⁴ x 1000 or 2.34 x 10 ⁻¹⁴ x 10³ =2.34 x 10⁻¹¹