Mole Conversion: How many molecules are in 0.348 moles of Dihydrogen oxide?

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

Can someone me with 3 and 4 plz. this is for masteries test.

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?