Question

given that the mass density of the gold is roughly 1.91 x 10^4 kg/m^3

Answer 1

Given that,

Mass density of gold $\rho=1.91\times10^{4}\ kg/m^3$

Suppose, The volume of gold is 1.23 cm³

We need to calculate the mass of gold

Using formula of density

$\rho=\dfrac{m}{V}$

$m=\rho\times V$

Where, m = mass

$\rho$ =density of gold

V = volume

Put the value into the formula

$m=1.91\times10^{4}\times1.23\times10^{-6}$

$m= 2.34\times10^{-2}\ kg$

$m=23.4\ gram$

Hence, The mass of gold is 23.4 gram.