Match the words with the proper definitions. Question 5 options:

Increasing this increases the average kinetic energy of the reactant molecules (more collisions means more molecules with energies greater than the activation energy).

Increasing this increases the exposure to other substances, thus increasing the frequency of collisions.

Increasing this will increase the frequency of collisions because you are adding more reactants.

This increases the rate of a system's reactions without being used up itself.

1.
Concentration

2.
Temperature

3.
Surface area

4.
Catalyst

water is used to store them because it would keep the radiation from getting out in the open and causing harm to the workers

c is the answer because when something is left after something evaporates that shows the chemical change.

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them