Calculate mass in kg of 2.5 mole ammonia.

Calculate mass in kg of 2.5 mole ammonia.
  1. $5.10 \times 10^{-2} \mathrm{~kg}$
  2. $4.25 \times 10^{-2} \mathrm{~kg}$.
  3. $1.72 \times 10^{-2} \mathrm{~kg}$
  4. $3.44 \times 10^{-2} \mathrm{~kg}$

Solution

$\begin{aligned} & \text {Molar mass of ammonia }=17 \mathrm{~g} \mathrm{~mol}^{-1} \\ \therefore \quad 2.5 \text { mole contains } & \frac{17 \mathrm{~g} \mathrm{~mol}^{-1} \times 2.5 \mathrm{~mol}}{1} \\ & =4.25 \times 10^{-2} \mathrm{~kg}\end{aligned}$

Asked in: MHT CET 2024 (16 May Shift 2)

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