JAMB - Chemistry (2006 - No. 29)
What is the molar mass of a substance, if 0.4 mole of the substance has a mass of 25.0g?
62.5 g
40.0 g
6.3 g
2.5 g
Penjelasan
Given:
m = 25g
n = 0.4
M = ?
Using Number of moles, n = \(\frac{mass}{Molar mass}\)
M = \(\frac{m}{n}\)
M = \(\frac{25}{0.4}\)
M = 62.5g