How many grams of water are required to produce 5.50 L of ...

[ec501234]

How many grams of water are required to produce 5.50 L of hydrogen gas at 25.0C and 755 mm Hg pressure according to the chemical equation shown below?
 
  BaH2(s) + 2 H2O(l)  Ba(OH)2(aq) + 2 H2(g)
 
  A) 2.01 g
  B) 4.02 g
  C) 4.07 g
  D) 8.04 g

Question 2

How many liters of hydrogen gas can be generated by reacting 9.25 grams of barium hydride with water at 20C and 755 mm Hg pressure according to the chemical equation shown below?
 
  BaH2(s) + 2 H2O(l)  Ba(OH)2(aq) + 2 H2(g)
 
  A) 0.219 L
  B) 0.799 L
  C) 1.60 L
  D) 3.21 L

Question 3

Which of the following ions has a relative ratio of oxygen atoms to the central atom that is not a whole number?
 
  A) dichromate
  B) bicarbonate
  C) permanganate
  D) perchlorate

[fatboyy09]

Answer to Question 1

B

Answer to Question 2

D

Answer to Question 3

A

[ec501234]

Wow, this really help

[gcook]

TYSM