12 grams of carbon are still present, and 4 grams of hydrogen.
The mass of 6.022 10 23 atoms, molecules, or formula units makes up one mole of a substance, which is known as the molar mass. This value is given in grams per mole. The primary distinction between the two is the fact that molar mass provides the mass of a mole of a certain material. In contrast, molecular weight refers to a substance's molecule's mass.
A mole of CH4 weighs 16 grams.
32 grams is divided by 32 to get 2 moles.
1 mole of CH4 molecules have been eliminated, leaving just 1 mole behind (1 mole = 6.022 1023 gone).
Therefore, 12 grams of carbon are still present, and 4 grams of hydrogen.
Learn more about molar mass here-
https://brainly.com/question/22997914
#SPJ9