Binary compounds of alkali metals and hydrogen react with water to liberate hydrogen gas. the hydrogen gas from the reaction of a sample of sodium hydride with an excess of water fills a volume of 0.475 l above the water. the temperature of the gas is 35 ∘c and the total pressure is 755 mmhg.
find the mass of h2 liberated and the mass of nah that reacted.

Explanation:

The reaction that takes place is

To find the mass of H₂ liberated we use PV=nRT:

Then we use the moles of H₂ formed by the reaction to calculate the moles of NaH that reacted, and finally the mass using its molecular weight:

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explanation:

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