PLEASE HELP 4.) How many FORMULA UNITS of strontium nitrate are needed to react with 345 GRAMS of
ammonium phosphate?

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

d.) circle motion requires a force to give it a centripetal acceleration.

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;