# How many grams are there in a 3 5 moles of oxygen?

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## How many grams are in 3.5 moles?

The mass of 3.5 moles of Ca is 140 g to two significant figures.

=2.5×16= 40g. `

## How many grams are in oxygen?

One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.

## How many grams are in 4 moles of oxygen?

4 moles of oxygen gas would be equivalent to 4 moles x 32 g/mole = 128 g. Thus, 4 moles of oxygen gas (O2) would have a mass of 128 g.

## How many grams are in a mole?

The mass of one mole of a substance is equal to that substance’s molecular weight. For example, the mean molecular weight of water is 18.015 atomic mass units (amu), so one mole of water weight 18.015 grams.

## How many oxygen molecules are in 3 moles of oxygen?

You have 3 moles, so there are 3×6.022×1023 oxygen molecules .

## How many moles is CH4?

(molar mass CH4 = 16.0 g/mol] G: 1.58 moles CH4 D: ?

## What is the volume of 3 moles of o2 at STP?

3 moles of oxygen at STP will occupy a volume of 3×22. 4=67. 2 L.