directions: write t for true or f for false. if false, correct the statement.
6. ____ when two liquids are mixed, some of the matter disappears.
7. ____ the total mass of a mixture equals the mass of all substances before mixing.
8. ____ if a gas forms and escapes during mixing, the total mass is still conserved, even if it appears smaller.
9. ____ mixing substances in an open container is the best way to prove conservation of matter.
10. ____ the law that says matter cannot be created or destroyed is called the law of conservation of matter.

Question

Accepted Answer

### Question 6
# Explanation:
## Step1: Recall the Law of Conservation of Matter.
Matter cannot be created or destroyed, only transformed. So when two liquids are mixed, matter doesn't disappear.
## Step2: Determine the truth value.
The statement "When two liquids are mixed, some of the matter disappears" is false. A correct statement would be "When two liquids are mixed, no matter disappears (matter is conserved)".
# Answer: F; Correct statement: When two liquids are mixed, no matter disappears (matter is conserved).

### Question 7
# Explanation:
## Step1: Apply the Law of Conservation of Mass.
The total mass of a system remains constant during physical mixing (no chemical reactions that would cause mass change in a closed system). So the total mass of a mixture should equal the sum of the masses of the substances before mixing.
## Step2: Determine the truth value.
The statement "The total mass of a mixture equals the mass of all substances before mixing" is true (assuming a closed system or no mass loss like gas escaping).
# Answer: T

### Question 8
# Explanation:
## Step1: Recall the Law of Conservation of Mass.
Even if a gas forms and escapes, the total mass (including the mass of the gas) is conserved. The apparent smaller mass is because the gas is no longer in the container, but the total mass in the universe (or the original system including the gas) is still the same.
## Step2: Determine the truth value.
The statement "If a gas forms and escapes during mixing, the total mass is still conserved, even if it appears smaller" is true.
# Answer: T

### Question 9
# Explanation:
## Step1: Analyze the effect of an open container.
In an open container, if a gas is produced, it can escape, making the measured mass of the mixture (in the container) less than the total mass of the substances before mixing. To prove conservation of matter, a closed container is better to prevent mass loss.
## Step2: Determine the truth value.
The statement "Mixing substances in an open container is the best way to prove conservation of matter" is false. A correct statement would be "Mixing substances in a closed container is the best way to prove conservation of matter".
# Answer: F; Correct statement: Mixing substances in a closed container is the best way to prove conservation of matter.

### Question 10
# Explanation:
## Step1: Recall the definition of the Law of Conservation of Matter.
The Law of Conservation of Matter (or mass) states that matter cannot be created or destroyed in a chemical or physical process.
## Step2: Determine the truth value.
The statement "The law that says matter cannot be created or destroyed is called the Law of Conservation of Matter" is true.
# Answer: T

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Question

Explanation:

Question 6

Step1: Recall the Law of Conservation of Matter.

Step2: Determine the truth value.

Step1: Apply the Law of Conservation of Mass.

Step2: Determine the truth value.

Step1: Recall the Law of Conservation of Mass.

Step2: Determine the truth value.

Answer:

Question 7