2H2+ O2 —> 2H2 O
What mass of oxygen gas (in grams) is needed to completely react with 100.0 grams of hydrogen gas to form water
___ g O2

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.