How many grams does 0.500 moles of CuBr weigh?

Question:

How many grams does {eq}0.500 {/eq} moles of {eq}\rm CuBr {/eq} weigh?

Molecular Mass:

Molecular mass is the sum of atomic masses of the elements present in a molecule. It is obtained by multiplying the atomic mass of each element by the number of its atoms and adding them together.

A mole is the quantity of anything that has the same number of particles found in 12 grams of Carbon-12.

Answer and Explanation:

The mass of one mole of a substance in grams is called its molar mass. The molar mass in grams is numerically equal to atomic/ molecular/ formula mass.

Therefore, the molar mass of CuBr is equal to the sum of atomic mass of Cu and Br, that is, 63.546u + 79.90u = 143.45g/mol.

Hence, 0.500 moles of CuBr weigh 1/2 of 143.45g, that is, 71.725grams.


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What is Molar Mass? - Definition, Formula & Examples

from General Studies Science: Help & Review

Chapter 27 / Lesson 24
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