A balloon of methane gas CH4 has a temperature of 20 Degree

A balloon of methane gas, CH4, has a temperature of - 2.0 Degrees Celsius and contains 2.35 g of the gas. What is the temperature of the gas in kelvins? How many moles of the gas does the balloon contain?

Solution

molecular weight of CH4 = 12 g/mol for C + 4x1g/mol for H

= 16 g/mol

moles of CH4 = 2.35 g / 16 (g/mol) = 0.1469 mol

temperature:

T= -2 + 273 (K conversion factor)

=271K