Plant cells and animal cells were observed under a microscope. The characteristics of two cells are listed below. Cell X: Has chloroplast
Cell Y: Does not have a cell wall

Which statement about the two cells is correct? (5 points)

a
Cell X has a cell membrane.

b
Cell X has a small vacuole.

c
Cell Y has a large vacuole.

d
Cell Y has chloroplast.

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

In the experiment you asked to react hydrochloric acid and with sodium hydroxide. when measuring the volume of the reactants, which instrument would give the greatest precision.

Fred is studying a substance that is made out of only one element. this means that