Final answer:
To find the number of moles of CH4 in 112 grams, divide the mass by the molar mass of CH4, which is 16 g/mol, yielding 7 moles of CH4.
Step-by-step explanation:
To determine how many moles of CH4 are contained in 112 grams of that substance, you would use the formula:
moles of CH4 = mass of CH4 (in g) / molar mass of CH4 (in g/mol)
Given the molar mass of CH4 is 16 g/mol, we calculate as follows:
moles of CH4 = 112 g / 16 g/mol = 7 moles
Therefore, 112 g of CH4 contains 7 moles of the substance.