A student has a cell suspension of 3.3x105 cells/mL in 10 mL of media. They need to plate 5 mL of volume at a cell density of 5x105 cells/mL in a T25 cell culture flask. How can the student concentrate the cells and what volume should they resuspend the cells in?

Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.

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 .

How many atoms or molecules are there in a mole of a substance?