If you have three (3) moles of Li, it will weigh (in grams) 21 grams
Description of mole
The mole of a substance is related to it's mass and molar mass according to the following equation
Mole = mass / molar mass
With the above formula, we can obtain the mass of Li
How to determine the mass of Li
The following data were obtained from the question:
- Mole of Li = 3 moles
- Molar mass of Li = 7 g/mol
- Mass of Li =?
The mass of Li can be o obtained as illustrated below:
Mole = mass / molar mass
Cross multiply
Mass = mole × molar mass
Mass of Li = 3 × 7
Mass of Li = 21 g
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