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## How many grams are in a mole of Li2O?

13.8 g/mol + 16.0 g/mol therefore the molar mass of Lithium oxide is **29.8 g/mol**.

## How many grams are in 4.900 moles of Li2O?

Multiplying this molecular mass by the given number of moles will give the weight in grams of the substance. Therefore $4.500$ moles $L{i_2}O = 29.881g/mol times 4.500moles = **134.46grams**$.

## How much is 4 moles O2?

Since 1 mole of oxygen is equivalent to 32 g, 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 4.50 moles of lithium oxide li2o?

So to get the mass of 4.500 mol , we simply mulitply the molar mass by the number of moles: 29.88 g⋅mol−1 × 4.500 mol ≈ **130⋅g** .

## How many molecules are in 23 moles?

The number of molecules of oxygen in 23 moles of oxygen is **1.385 x 1025 molecules** of oxygen.

## How many moles is 25 grams of water?

Hence, **1.38 moles** (mol) are present in 25 grams of water.

## How many oxygen molecules are in 32 moles?

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 helium atoms are in a mole?

A mole of helium gas contains **6.02 x 1023 helium atoms**.