Question

# A 2.16 g of a substance occupies 1.5 cm3. Its density to appropriate significant figure is:

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Solution

## Step 1 : Given data Mass of substance = $2.16g$Volume = $1.5c{m}^{3}$Step 2 : Formula used Density = $\frac{mass}{volume}$Step 2: Evaluating density Putting values in above formula , density = $\frac{2.16}{1.5}$$=1.44g/c{m}^{3}$Since There are$3$significant figures in measured mass Whereas there are only $2$significant figures in measured volume. Hence density should be expressed to only $2$ significant figures i.e $1.4g/c{m}^{3}$

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