Question

How many oxygen molecules are in 3. 36 l of oxygen gas at stp.

Answer 1

9.03 × 10²² oxygen molecules.

Step-by-step explanation:

We want to determine the number of oxygen molecules in 3.36 L of oxygen gas at STP.

Recall that at STP, for any gas, it has a volume of 22.4 liters per mole.

Additionally, recall that there are 6.02 × 10²³ substances in one mole of a substance.

With the given value, hence multiply:

`\displaystyle \begin{aligned} 3.36\text{ L O$_2$} & \cdot \frac{1\text{ mol O$_2$}}{22.4\text{ L O$_2$}}\cdot \frac{6.02* 10^(23)\text{ molecules O$_2$}}{1 \text{ mol O$_2$}} \\ \\ &= 9.03* 10^(22) \text{ molecules O$_2$}\end{aligned}`

In conclusion, there are aobut 9.03 × 10²² oxygen molecules in 3.36 L of oxygen as at STP.