Question

Remember to use the proper number of significant figures and leading zeros in all calculations. Gelatin has a density of 1.27 g/cm³. If you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g 2500 g 3.9 x 10-4 3.937x 10-4

Answer 1

Answer : The mass of gelatin is 2500 g.

Solution : Given,

Density of gelatin = $1.27g/Cm^3$

Volume = 2.0 L = $2.0\times 10^3Cm^3$              $(1L=10^3Cm^3)$

Formula used :

$Density=\frac{Mass}{Volume}$

By rearranging the formula.

$Mass=Density\times Volume$

Now put all the given values in this formula, we get

$Mass=(1.27g/Cm^3)\times (2.0\times 10^3Cm^3)=2.5\times 10^3g=2500g$

In case of multiplication, we take the least precise number of significant figure.

Therefore, the mass of gelatin is 2500 g.