If the mass of a sample of ammonium phosphate ((NH4)3PO4] is 149.0 grams which contains: 42.0 grams of N, 12.0 grams of H, 31.0 grams of P, and 64.0 grams of O. Calculate the percent by mass of
H present in the compound. (ONLY TYPE THE NUMBER NOT THE UNIT)

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.