Which of the following is considered acidic?(1 point)

Responses

Vinegar
Vinegar

Lime Water
Lime Water

Soap
Soap

Ammonia

5 answers

Vinegar
The chemical formula for carbonic acid is H2CO3
. How many compounds are represented by this formula?(1 point)
Responses

2
2

3
3

6
6

1
1
A student cuts some fabric into two pieces. Is this change physical or chemical?(1 point)
Responses

It is a physical change because there is no reaction.
It is a physical change because there is no reaction.

It is a physical change because the process is reversible.
It is a physical change because the process is reversible.

It is a chemical change because the size changes.
It is a chemical change because the size changes.

It is a chemical change because there is no phase change.
It is a physical change because there is no reaction.