How many grams of sodium (Na) are needed to react completely with 16.5 g of sulf

Chemistry
Tutor: None Selected Time limit: 1 Day

A.) 33.0g

B.) 23.0g

C.) 8.25g

D.) 23.7g

E.) 11.8g

Oct 29th, 2015

Thank you for the opportunity to help you with your question!

To determine the gram of sodium we have to first of all write the chemical reaction of sodium with sulfur.

We have

2Na+ S=>Na2S

From the reaction 2 mole of sodium react with 1 mole of sulfur.

Now,weight of sulfur=16.5 g

Mole of sulfur=weight/Atomic weight =16.5/32=.515625 mole

So mole of sodium =2*.515625=1.03125

Weight of sodium =mole*atomic weight =1.03125*23 =23.7 g(answer-option D)


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Oct 29th, 2015

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