Select the two variables that are held constant when testing boyle's law in a manometer. pressure temperature volume of gas mass of gas atmospheric pressure

a) Temperature  

b) Mass of gas

Explanation:

The Boyles’ law states that the pressure of a gas is inversely proportional to its volume (with a fixed mass). This has been proved when temperature was kept constant.

Thus, overall there were two quantities that were not changed during Boyle’s experiment  

a)Temperature  

b)Mass of gas

Hence, the formula for Boyle’s law is as follows  

Where  P is pressure

V is volume and k is constant

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation: