Name Open note quiz
February 5, 2021
1. A
is a change in the appearance or form of matter.
It does not change the chemical composition of the matter.
2. A
is a change in matter that produces one or more new
substances
3.
must be added to break bonds.
4. An example of energy is
5. What are two signs that a chemical change has occurred?
6. An ice cube absorbs energy so it is an
reaction
7. A
increases the rate or speeds up a chemical reaction.

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

2b2t

explanation:

2b2t