Question 17 (2 points)

Question

How many moles of CH4 are present in a sample of 10.55 grams of CH4? (The molar mass of CH4 is 16.05 grams/mole).





If you are unsure how to convert grams to moles, please see the example problem linked HERE.

a
0.657 moles of CH4

b
26.6 moles of CH4

c
169.3 moles of CH4

d
1.52 moles of CH4

Answer 1

To calculate the number of moles present in a sample of CH4, you need to divide the mass of the sample by the molar mass of CH4.

Number of moles = Mass / Molar mass
Number of moles = 10.55 g / 16.05 g/mol
Number of moles = 0.657 moles

Therefore, the answer is:
a) 0.657 moles of CH4