What mass of Na is needed to react with H2O to liberate 566 L H2 gas at STP, accord-
ing to the equation below?
2 Na(s) + 2 H2O(l) → H2(g) +2 NaOH(aq)
Answer in units of g. Your answer must be
within 3.0%

What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen, and 48.68% fluorine? the molar mass of the compound is 156.12 g/mol

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?