As the air molecules move through the valve they have friction as they hit the walls, and its this friction that causes it to heat up.
Answer:
a mixture is a material made up of two or more different substances which are physically combined.
Answer:
It is <em><u>photosynthesis</u></em><em><u> </u></em><em><u>and </u></em><em><u>transpiration</u></em><em><u> </u></em>
hope it helps
1 mol of CO2 is 44.01g/mol
So multiply that by 2 to get 2 mol of CO2, which is 88.02g