How many mol of hydrogen present in 16g methane
well, how many moles of CH4 is 16g?
clearly, 4 times that many atoms of H.
But, hydrogen comes as H2, not just H, so divide that by 2.
Actually, the problem isn't stated properly. It should spell out if the answer needed is for mols H atoms or mols H2 molecules
To calculate the number of moles of hydrogen present in 16g of methane, you need to know the molecular formula of methane, CH4, and its molar mass.
The molar mass of methane (CH4) is the sum of the molar masses of its constituent elements: carbon (C) and hydrogen (H).
The molar mass of carbon (C) is 12.01 g/mol, and the molar mass of hydrogen (H) is 1.01 g/mol.
Since there is only one carbon atom in one molecule of methane and four hydrogen atoms, we can calculate the molar mass of methane as follows:
Molar mass of CH4 = (molar mass of C) + 4 * (molar mass of H)
= 12.01 g/mol + 4 * 1.01 g/mol
= 12.01 g/mol + 4.04 g/mol
= 16.05 g/mol
Now, to find the number of moles of hydrogen in 16g of methane, we need to use the molar mass of methane.
Number of moles = Mass / Molar mass
Number of moles of H = (Mass of methane) * (Number of moles of H / Molar mass of CH4)
= 16g * (4 / 16.05 g/mol)
= 4g / 16.05 g/mol
Calculating this value would give us the number of moles of hydrogen present in 16g of methane.