How many molecules are there in 0.00250 mole of acetic acid? Express your answer in scientific notation using E to represent scientific notation.
For example, 6.022x10^23 would be represented as 6.022E23.
Round your answers to the proper number of significant figures and do not include
units with you answer.

Why are people not able to scuba dive in the deep part of the ocean

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Stage in which a star’s outer layers have started to cool and grow outward?