When guard cells are full, they bulge. This increases the size of the gap between them and opens the hole in the
leaf.
Guard cell
Water and
oxygen
Carbon
dioxide
Guard cell
Which object is the best model of a guard cell?

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Ineed to find the answer of this question because i dont understand it

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j