Trick question. Hydrogen is a diatomic molecule; it travels around with a buddy as H2 and not as a single atom. This is generally true of all gases except the inert gases. By definition, a mole of anything has 6.022 x 1023 "units" of that stuff. (That's Avogadro's number.) The "stuff" is the atoms or the molecules of that "stuff" and it can be thought of in terms of the "reaction units" of that stuff. We do not have H2 + O = H2O. We have 2H2 + O2 = 2H2O because oxygen is diatomic like hydrogen. The "reaction units" of hydrogen and oxygen are H2 and O2 respectively. Now the answer will appear. A mole of hydrogen is 6.022 x 1023 units of hydrogen which will be 6.022 x 1023 molecules of hydrogen which will be (6.022 x 1023 times 2) atoms of hydrogen which will be 1.204 x 1024 atoms of hydrogen.
divide the mass of the hydrogen by the molar mass.
0.86 moles CH4 (4 mole H/1 mole CH4)(6.022 X 10^23/1 mole H) = 2.1 X 10^24 atoms of hydrogen --------------------------------------------
31 grams CH2O (1 mole CH2O/30.026 grams)(2 mole H/1 mole CH2O)(6.022 X 1023/1 mole H) = 1.2 X 1024 atoms of hydrogen =======================
7.30 C2H6O (6 moles H/1 mole C2H6O)(6.022 X 1023/1 mole H) = 2.64 X 1025 atoms of hydrogen =====================
CH3COOH CH3COO- + H+So there is only one acidic H atom.[Only the 'bold' H atom is acidic, the 3 'methyl' H's are not!]
1 mole NH3 (3 mole H/1 mole NH3) = 3 mole hydrogen atoms
divide the mass of the hydrogen by the molar mass.
593 g H2O x 1 mol/18 g x 2 mole H/mole H2O x6.02x10^23 H atoms/mole H = 4x10^25 atoms of H
0.86 moles CH4 (4 mole H/1 mole CH4)(6.022 X 10^23/1 mole H) = 2.1 X 10^24 atoms of hydrogen --------------------------------------------
5.839 grams C8H8 ( 1 mole C8H8/104.144 grams)(8 mole H/1 mole C8H8)(6.022 X 1023/1 mole H) = 2.701 X 1023 atoms of hydrogen --------------------------------------------
31 grams CH2O (1 mole CH2O/30.026 grams)(2 mole H/1 mole CH2O)(6.022 X 1023/1 mole H) = 1.2 X 1024 atoms of hydrogen =======================
2 grams C27H46O (1 mole C27H46O/386.638 grams)(46 mole H/1 mole C27H46O)(6.022 X 1023/1 mole H) = 1 X 1023 atoms of hydrogen =====================
7.30 C2H6O (6 moles H/1 mole C2H6O)(6.022 X 1023/1 mole H) = 2.64 X 1025 atoms of hydrogen =====================
Quite a few! 738 grams water (1 mole H2O/18.016 grams)(2 mole H/1 mole H2O)(6.022 X 10^23/1 mole H) = 4.93 X 10^25 atoms of hydrogen
Quite a few! 871 grams water (1 mole H2O/18.016 grams)(2 moles H/1 mole H2O)(6.022 X 1023/1 mole H) = 5.82 X 1025 atoms of hydrogen ========================
8.30 moles (NH4)2S (8 moles H/1 mole (NH4)2S)(6.022 X 1023/1 mole H) = 3.99 X 1025 atoms of hydrogen ========================
CH3COOH CH3COO- + H+So there is only one acidic H atom.[Only the 'bold' H atom is acidic, the 3 'methyl' H's are not!]