1. Match the missing coefficient to the correct number of molecules so that the equation adheres to the conservation of mass.

Question

(X)N2 + (Y)H2 → (Z)NH3

Column A
1.
X
2.
Y
3.
Z
Column B
a.1
b.2
c.3

2. For each description, decide if it is describing an acid or a base.

Column A
1.
Tastes sour.
2.
Tastes bitter
3.
H2SO4
4.
LiOH
5.
pH above 7
6.
pH below 7
Column B
a. Acid
b. Base

Answer 1

1. Balancing the Chemical Equation

The chemical equation given is:

\[(X)N_2 + (Y)H_2 → (Z)NH_3\]

To balance the equation, we need to determine the values of \(X\), \(Y\), and \(Z\).

1. Each molecule of NH3 contains 1 nitrogen (N) and 3 hydrogens (H).
2. Since N2 has 2 N atoms, we will need 2 NH3 to get 2 N atoms on the right side.
3. To produce 2 NH3 (which gives 6 H atoms), we will need 3 H2 on the left.

Thus:

• \(X = 1\) (1 N2)
• \(Y = 3\) (3 H2)
• \(Z = 2\) (2 NH3)

So, the matches are as follows:

• 1. X: a. 1
• 2. Y: b. 3
• 3. Z: c. 2

2. Acid and Base Identification

Based on the descriptions provided, here are the identifications:

1. Tastes sour: a. Acid
2. Tastes bitter: b. Base
3. H2SO4: a. Acid
4. LiOH: b. Base
5. pH above 7: b. Base
6. pH below 7: a. Acid

So, the matches for Column A and Column B are:

• 1. (Tastes sour) → a. Acid
• 2. (Tastes bitter) → b. Base
• 3. (H2SO4) → a. Acid
• 4. (LiOH) → b. Base
• 5. (pH above 7) → b. Base
• 6. (pH below 7) → a. Acid