Question

Express $2.5\text{atm}$ in $\text{kPa}$.

Answer 1

$1\text{atm}=1.01\times {10}^5\text{Pa}$

$2.5\text{atm}=2.5\times 1.01\times {10}^5\text{Pa}=2.525\times {10}^5\text{Pa}$

$1\text{kPa}=1000\text{Pa}={10}^3\text{Pa}$

$2.525\times {10}^5\text{Pa}=2.525\times {10}^2\text{kPa}=252.5\text{kPa}$