Question

Relative density of silver is 10.5. The density of silver in SI unit is _________.

• A. $20.5\times {10}^3$ $kg{m}^{-3}$
• B. $10.5\times {10}^{3}kg{m}^{-3}$
• C. $10.5\times {10}^{3}gc{m}^{-3}$
• D. $20.5\times {10}^{3}gc{m}^{-3}$

Answer 1

The correct option is B $10.5\times {10}^{3}kg{m}^{-3}$

Given:
Relative density of silver, ${\rho }_{s,w}=10.5$

Density of water is ${\rho }_w=1000kg{m}^{-3}$
Let the density of silver be ${\rho }_s$
From definition of relative density:
${\rho }_{s,w}=\frac{{\rho }_s}{{\rho }_w}$
${\rho }_s={\rho }_{s,w}{\rho }_w$
${\rho }_s=10.5\times {10}^{3}kg{m}^{-3}$