```latex
\begin{tabular}{|c|c|c|c|c|}
\hline
\begin{tabular}{l}
Example: \\
Steel Wool \\
+Oxygen \\
(Fire)
\end{tabular} &
\begin{tabular}{l}
There are 6 grams of steel \\
wool. It is grey and has a \\
stringy texture. There is 1 \\
gram of oxygen in the \\
tank.
\end{tabular} &
\begin{tabular}{l}
The iron oxide is 7 \\
grams.
\end{tabular} &
\begin{tabular}{l}
The people added \\
both 6 grams of \\
steel wool and 1 \\
gram of oxygen.
\end{tabular} &
\begin{tabular}{l}
This was a chemical \\
reaction.
\end{tabular} \\
\hline
Egg + Heat &
\begin{tabular}{l}
There is 1 egg and 45 \\
grams of heat.
\end{tabular} &
\begin{tabular}{l}
There is one \\
cooked egg (41 \\
grams) and some \\
cracked eggshells \\
(4 grams).
\end{tabular} &
\begin{tabular}{l}
The mass is \\
converted by the \\
heat for the egg.
\end{tabular} &
\begin{tabular}{l}
This was a physical \\
change.
\end{tabular} \\
\hline
\begin{tabular}{l}
Water + \\
Heat
\end{tabular} &
\begin{tabular}{l}
There is 75 grams of water \\
and some heat.
\end{tabular} &
\begin{tabular}{l}
There is 75 grams \\
of steam gas \\
released.
\end{tabular} &
\begin{tabular}{l}
Mass was \\
conserved \\
because 75 \\
grams of water \\
became 75 \\
grams of steam.
\end{tabular} &
\begin{tabular}{l}
This was a physical \\
change.
\end{tabular} \\
\hline
\begin{tabular}{l}
Zinc + \\
Hydrogen \\
Chloride
\end{tabular} &
\begin{tabular}{l}
There are 10 grams of \\
zinc. It is light brown or \\
pink and is powdery. There \\
are 5 grams of hydrogen \\
chloride in the beaker.
\end{tabular} &
\begin{tabular}{l}
There is Zinc \\
Chloride (12 \\
grams) and \\
Hydrogen Gas (3 \\
grams).
\end{tabular} &
\begin{tabular}{l}
The mass was \\
converted.
\end{tabular} &
\begin{tabular}{l}
There was a chemical \\
reaction.
\end{tabular} \\
\hline
\end{tabular}
```

Let's go through each example step by step to verify if mass is conserved. Mass conservation means that the total mass of the reactants should equal the total mass of the products.

### Steel Wool + Oxygen Example

- Reactants:
- 6 grams of steel wool
- 1 gram of oxygen
- Total mass of reactants: \(6 \text{ grams} + 1 \text{ gram} = 7 \text{ grams}\)

- Products:
- 7 grams of iron oxide

- Conclusion: Since the total mass of the reactants (7 grams) equals the total mass of the products (7 grams), mass is conserved. Therefore, this statement is True.

### Egg + Heat Example

- Reactants:
- 1 egg (mass not specified initially, so we assume it includes the heat)
- 45 grams of heat energy

- Products:
- 41 grams of cooked egg
- 4 grams of cracked eggshells

- Total mass of products: \(41 \text{ grams} + 4 \text{ grams} = 45 \text{ grams}\)

- Conclusion: The initial mass of the egg plus the heat (46 grams) does not match the final mass of the cooked egg and eggshells (45 grams). Hence, mass is not conserved. Therefore, this statement is False.

### Water + Heat Example

- Reactants:
- 75 grams of water

- Products:
- 75 grams of steam

- Conclusion: Since the mass of the reactants (75 grams) is equal to the mass of the products (75 grams), mass is conserved. Therefore, this statement is True.

### Zinc + Hydrogen Chloride Example

- Reactants:
- 10 grams of zinc
- 5 grams of hydrogen chloride
- Total mass of reactants: \(10 \text{ grams} + 5 \text{ grams} = 15 \text{ grams}\)

- Products:
- 12 grams of zinc chloride
- 3 grams of hydrogen gas
- Total mass of products: \(12 \text{ grams} + 3 \text{ grams} = 15 \text{ grams}\)

- Conclusion: Since the total mass of the reactants (15 grams) equals the total mass of the products (15 grams), mass is conserved. Therefore, this statement is True.

### Summary

Here is the result for each example:
- Steel Wool Example: True
- Egg + Heat Example: False
- Water + Heat Example: True
- Zinc + Hydrogen Chloride Example: True