Read the given equation.

2na + 2h2o → 2naoh + h2

during a laboratory experiment, a certain quantity of sodium metal reacted with water to produce sodium hydroxide and hydrogen gas. what was the initial quantity of sodium metal used if 6.30 liters of h2 gas were produced at stp?

a. 10.3 grams
b. 12.9 grams
c. 14.7 grams
d.15.2 grams

b. 12.9 grams

Explanation:

According to avogadro's law, 1 mole of every gas occupies 22.4 Liters at STP ,contains avogadro's number of particles and weighs equal to the molecular mass.

Thus at STP :

1 mole of hydrogen is produced by 2 moles of sodium metal

i.e. 22.4 L of is produced by 46 gram of sodium metal

6.3 L of is produced by= of sodium metal

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.