Question

Mass of a body is 42.2 gm and its density is 7.981 g/cm3 what will be its volume, with regard to significant digits? 52.87 cm3 26 cm3 5.29 cm3 26.3 cm3​

Answer 1

Answer:

Explanation:

Here, mass, m=4.237g

Volume, V=2.5cm  3

 

We know the formula  

Density, ρ=  Volume /  Mass  

 

4.237g  / 2.5cm  3  =1.6948gcm  −3

As the mass has 4 significant figures and volume has 2 significant figures, therefore, as per rule, density will have only two significant figures. Rounding off to two significant figures, we get, ρ=1.7gcm  −3