A certain amount of a metal whose equivalent weight is 28, displaces 0.7 litre of hydrogen measured at NTP from an acid. Calculate the weight of the metal.

Explanation

To solve the problem, we need to calculate the weight of the metal that displaces 0.7 liters of hydrogen gas at Normal Temperature and Pressure (NTP). The equivalent weight of the metal is given as 28.

### Step-by-Step Solution:

**Step 1: Calculate the number of moles of hydrogen gas (H₂) displaced.**

At NTP, 1 mole of any gas occupies 22.4 liters. Therefore, we can calculate the number of moles of hydrogen gas displaced using the formula:

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