Find the Density at STP NaK

$N a K$

Step 1

To find the mass of $1$ mole of $N a K$ 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 $N a K$ $=$ $(mass of Na)$ + $(mass of K)$

Step 2

Fill in the atomic masses from the periodic table.

mass of $1$ mole of $N a K$ $=$ $(22.98999977)$ + $(39.09999847)$

Step 3

Simplify the result.

Remove parentheses.

mass of $1$ mole of $N a K = 22.98999977 + 39.09999847 g$

Add $22.98999977$ and $39.09999847$ .

mass of $1$ mole of $N a K = 62.08999824 g$

Step 4

One mole of any gas occupies $22.4 L$ at STP (standard temperature and pressure).

$V = 22.4 L$

Step 5

Density is mass over volume.

$\frac{62.08999824 g}{22.4 L}$

Step 6

Factor $62.08999824$ out of $62.08999824 g$ .

$\frac{62.08999824 (g)}{22.4 L}$

Step 7

Factor $22.4$ out of $22.4 L$ .

$\frac{62.08999824 (g)}{22.4 (L)}$

Step 8

Separate fractions.

$\frac{62.08999824}{22.4} \cdot \frac{g}{L}$

Step 9

Divide $62.08999824$ by $22.4$ .

$2.77187492 \frac{g}{L}$

Step 10

Combine $2.77187492$ and $\frac{g}{L}$ .

$\frac{2.77187492 g}{L}$

Find the Density at STP NaK

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