How many hydrogen atoms are in 0.1262 mol of H2SO4?

Answer 1

The formula shows that each mol contains 2 hydrogen atoms, and, for any substance, the number molecule per mole is Avogadro's Number. Therefore, 2 X 0.1262 X 6.022 X 1023 or about 1.520 X 1023 hydrogen atoms, to the justified number of significant digits.

Answer 2

There are 0.1262 mol of H2SO4, which means there are 0.1262 mol * 2 = 0.2524 mol of hydrogen atoms (H) in total. Since each molecule of H2SO4 contains 2 hydrogen atoms, there are 0.2524 mol * 6.022 x 10^23 atoms/mol = approximately 1.52 x 10^23 hydrogen atoms in 0.1262 mol of H2SO4.