This is from my chemistry assignment : 1) You have a tank of N2 gas. If the tank contains 11.65 L of the gas (at STP), how many molecules of N2 are in it?
can someone pls explain how I would answer this and what equation I would use ?

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.

Which of the following is not true about the atomic model of substances?