In the reaction 3h2+ what coefficient should be placed in front of nh3 to balance the reaction.
a.1
b2
c.3
d. no coefficient is needed

  2

Explanation:

There are 3·2 = 6 H and 1·2 = 2 N on the left. These are combined as 1N+3H on the right, so the sum needs to be multiplied by 2 to make the numbers match. (6H+2N) = 2(3H+N)

  3H₂ + N₂ ⇔ 2NH₃

Draw a diagram to illustrate the problem as shown below.

Calculate the volume of the empty cone.
V₁ = (1/3)π*(6 in)²*(10 in) = 120π in³

Calculate the volume of the sphere.
V₂ = (4/3)π*(1.5 in)³ = 4.5π in³

The volume that can be filled with flavored ice is 
V = V₁ - V₂ = 115.5π in³ = 362.85 in³

Th volume is 115.5π in³ or 362.9 in³ (nearest tenth)