# How many moles of argon atoms are present in 11.2 L of argon gas at STP?

##### 2 Answers

What is the molar volume at

#### Explanation:

Well, the molar volume at

So you have a volume of

We note that

Using the current recommended STP values of

Using the older standard, as indicated in the explanation,

#### Explanation:

Current values for STP are

At these current values, the molar volume of a gas is

In order to determine the number of moles of the given volume of Ar, divide the given volume by the molar volume of an ideal gas,

Simplify by multiplying by the inverse of the molar volume.

Using the older STP values of