Among alkali metals, only Li reacts directly with 
(present in air) to form lithium nitride as per equation: 
The amount of product formed (in grams) when 21 g of Li reacts with 14.4 g of air (having molar composition 
and 
) is_______ 
Text Solution
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(28)
Avg. molar mass of air 
Moles of 
For given reaction 
will be the limiting reagent.
Moles of 
formed 
Amount of 
formed 
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