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For O2, the molar mass is 2 × its atomic weight on the periodic table in grams per mole (g/mol). 3.5 mol O2 (g) contain 7.0 mol of oxygen atoms and have a mass of 112 g.

## How many moles are in 12.0 grams of O2?

Therefore, 12 g of oxygen gas has 0.375 moles.

## How many moles are in O2 G?

One mole of oxygen gas, which has the formula O_{2}, has a mass of 32 g and contains 6.02 X 10^{23} molecules of oxygen but 12.04 X 10^{23} (2 X 6.02 X 10^{23}) atoms, because each molecule of oxygen contains two oxygen atoms.

## How many moles are in 112 liters of oxygen gas at STP?

One mole of gas at STP occupies 22.4 L, so 112 liters amounts to: 1 mole/22.4 L x 112 L = 5 mole. So there is 5 mole of O2.

## What is the moles of oxygen?

Moles of a Substance and the Molecular Weight

The mass of oxygen equal to one mole of oxygen is 15.998 grams and the mass of one mole of hydrogen is 1.008 g. If we total up the gram amounts of each element in the water molecule = 15.998g/mol + 2(1.008g/mol) we get the molar mass of water = 18.014g/mol.

## How do I calculate moles?

How to find moles?

- Measure the weight of your substance.
- Use a periodic table to find its atomic or molecular mass.
- Divide the weight by the atomic or molecular mass.
- Check your results with Omni Calculator.

## How many moles of O are in o2?

A mole is 6.023E23 of whatever you are counting. A mole of O2 molecules has 6.023E23 molecules, and each molecule is made up is two atoms of oxygen. That means that there are two moles of oxygen atoms in a mole of O2, or 1.2046E24 of them.

## How many moles of o2 are in 48 g o2?

48 g of individual oxygen atoms = 3 moles of oxygen atoms.

## What is number of mole?

A mole is defined as the mass of the substance which consists of the equal quantity of basic units. Example atoms in 12 grams are the same as 12C. A mole fraction indicates the number of chemical elements. … One mole of any substance is equal to the value of 6.023 x 10^{23} (Avagadro number).

## What is the volume of 1 mole of gas at STP?

What is the volume of 1 mole of an ideal gas at STP (Standard Temperature and Pressure = 0 °C, 1 atm)? So, the volume of an ideal gas is 22.41 L/mol at STP. This, 22.4 L, is probably the most remembered and least useful number in chemistry.

## How many liters is 7 moles of air at STP?

At STP, gases have a volume of 22.4 L per mole.

## What is 1l in grams?

Since there are 1,000 grams in a kilogram, the answer is that 1 liter of water weights 1,000 grams.