Chemistry Examples

$K B r$

Step 1

To find the mass of $1$ mole of $K B r$ look up the atomic mass of each element and multiply it by the number of atoms contained in each element in the molecule.

mass of $1$ mole of $K B r$ $=$ $(mass of K)$ + $(mass of Br)$

Step 2

Fill in the atomic masses from the periodic table.

mass of $1$ mole of $K B r$ $=$ $(39.09999847)$ + $(79.90000152)$

Step 3

Simplify the result.

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Step 3.1

Remove parentheses.

mass of $1$ mole of $K B r = 39.09999847 + 79.90000152 g$

Step 3.2

Add $39.09999847$ and $79.90000152$ .

mass of $1$ mole of $K B r = 119 g$