D = m / V
0.736 = 225.0 / V
V = 225.0 / 0.736
V = 305.7 cm³
The best and most correct answer among the choices provided by the question is the second choice , b. sodium hydroxide .
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
You could let the air out of the balloon while it is under the water with a container filled with water upside down over it. And measure the water displacement.
To balance it, it would be N2 + 3H2 ------> 2NH3.
for c) it would be 2N2 + 6H2 -------> 4NH3
