Question

There are 6.02 × 1023 atoms in 1 gram of hydrogen. How many atoms are there in 400 grams of hydrogen? Write your answer in scientific notation. If necessary, round your answer to two decimal places.

2.41 × 10^26
2.41 × 10^23
2.41 × 10^20
24.08 × 10^25

Answer 1

The first one is the correct answer: 2.41 × 10^26

Explanation:

Answer 2

times 400
2408 times 10²³
2.408 times 10³ times 10²³
2.408 times 10²⁶
2 decimal places
2.41 times 10²⁶