Ask a Teacher

Search



HOW MANY ATOMS FOR 1 MOLE OF HYDROGEN OF MASS 1g?HOW TO FIND IT?

Moles and masses

The mole (abbreviation “mol”) is the SI (Standard International) unit for “amount of substance”.The mole is 602 204 500 000 000 000 000 000 or 6,022 × 1023 particles. This is a very big number! We call this number as Avogadro's number (the number of particles in a mole), equal to 6,022 × 1023.
12,0 g of carbon have one mole or 6,022 × 1023 carbon atoms. 63,5 g of copper is one mole of copper or 6,022 × 1023 copper atoms. In fact, if we measure the relative atomic mass of any element on the periodic table, we have one mole of that element.

Answer for the question

Hydrogen gas contains H2 molecules. 1 mole of H2 gas contains Avogadro number of molecules, 6.022 X 1023 therefore there are twice atoms of hydrogen 12.024 X 1023 = 1.204 X 1024   atoms

For hydrogen we have 1.01 g of sample and 1.01 u for relative atomic mass, so we have one mole of hydrogen, equals to 6.023 x 1023 hydrogen atoms.


comments powered by Disqus