Answer:
Disagree
Agree
Agree
Disagree
Explanation:
A chemical change is one in which a new kind of substance is formed. It is always accompanied by energy changes.
- It is wrong to assert that all chemical changes are dangerous. In our body system, chemical changes are constantly happening.
- Chemical changes shows the law of conservation of mass in that the amount of reactants and products are always the same.
- Chemical reactions occur when two substances are chemically combined together.
- Not all dissolution reaction are chemical changes. For example, when sugar dissolves in water, it is not a chemical change.
Find the proportion, and multiply it by 100 to get the percentage.
The proportion is 2.9/3.1=0.935
The percentage is 0.935*100=93.5
The density will become less, this is because thing with less density float to the top when things with more density float to the bottom. It also becomes colder.