How to Calculate Moles from Grams in Chemistry
What is the formula to convert grams to moles?
Given the molar mass of a substance, how can you calculate the number of moles from a given mass in grams?
How many moles are in 12.56 grams of CH4?
A. About 0.783
B. About 1.234
C. About 2.345
D. About 3.456
Answer:
A. About 0.783
Answer:
0.783 moles
In chemistry, to convert grams to moles, you need to use the formula:
Number of moles = Given mass in grams / Molar mass
In this case, for CH4 (methane), the molar mass is 16.04 g/mol. Therefore, to find the number of moles in 12.56 grams of CH4:
Number of moles = 12.56 g / 16.04 g/mol = 0.783 moles
So, there are about 0.783 moles in 12.56 grams of CH4.