Question

1. this has definite shape and volume.
2. this is a state of matter with no definite shape or volume.
3. in the law of ____________ of matter, matter is not created nor destroyed in any chemical or physical change.
4. balance the following chemical equation.

what number should be on the yellow line?
fe + 3 h₂so₄ -> 1 fe₂(so₄)₃ + 3 h₂

Explanation:

Step1: Identify state of matter for 15

Solids have definite shape and volume.

Step2: Identify state of matter for 16

Gases have no definite shape or volume.

Step3: Recall law for 17

The law is conservation of matter.

Step4: Balance chemical equation for 18

For the equation $\text{Fe}+3\text{H}_2\text{SO}_4
ightarrow1\text{Fe}_2(\text{SO}_4)_3 + 3\text{H}_2$, to balance the iron atoms, we need 2 iron atoms on the left - hand side.

Answer:

1. Solid
2. Gas
3. Conservation
4. 2