Calcium nitrate decomposes on heating according to the equation :
`2Ca(NO_3)_(2)to2CaO+4NO_(2)+O_(2)`
The relative molecular mass of calcium nitrate is 164. Calculate :
the weight of calcium oxide obtained when 16.4 g of calcium nitrate is heated to constant weight. `(Ca = 40, O = 16, N = 14) `

Explanation

To solve the problem step by step, we will follow these calculations:

### Step 1: Calculate the number of moles of calcium nitrate.

The formula to calculate moles is:
\[ \text{Number of moles} = \frac{\text{Given mass}}{\text{Molar mass}} \]
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