How many grams of Li3N can be formed from 1.75 moles of Li? ...

[saliriagwu]

How many grams of Li3N can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 6 Li(s) + N2(g)  2 Li3N(s)
 
  A) 18.3 g Li3N
  B) 20.3 g Li3N
  C) 58.3 g Li3N
  D) 61.0 g Li3N
  E) 15.1 g Li3N

Question 2

How many grams of calcium hydride are required to produce 4.56 L of hydrogen gas at 25.0C and 0.975 atm pressure according to the chemical equation shown below?
 
  CaH2(s) + 2 H2O(l)  Ca(OH)2(aq) + 2 H2(g)
 
  A) 3.82 g
  B) 7.64 g
  C) 15.3 g
  D) 45.6 g

Question 3

Which of the following does not have a charge of -2?
 
  A) carbonate
  B) chromate
  C) dichromate
  D) nitrate

[quynhmickitran]

Answer to Question 1

B

Answer to Question 2

A

Answer to Question 3

D