Question

b) 0.5 grams of hydrogen​

Answer 1

1 mole of hydrogen has a mass of 1 g. Therefore 0.5 grams of hydrogen, is 0.5 moles of hydrogen. 1 mole of a substance has 6.022*10^23 atoms. Therefore the no.of atoms is 6.022*10^23/2 which is 3.011*10^23. Hope it helps, please mark as brainliest.