Question

There are 6.02 × 1023 atoms in 1 gram of hydrogen. How many atoms are there in 800 grams of hydrogen? Write your answer in scientific notation. If necessary, round your answer to the nearest hundredth.

Answer 1

$6.02\cdot 10^{23}\cdot 800=4816\cdot 10^{23}\approx \boxed{4.82\cdot 10^{26}}$

Answer 2

That would be around 4.82 * 10^28