PLEASEEE HEKLL BRAINLKES Natural gas consists mostly CH4. Burning CH4 in O2 gas produces H20 and CO2. How many moles of
O2 is needed for burning 1.6 g CH4?
O 6.4 mol
O 0.1 mol
O 0.4 mol
O 0.2 mol

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

Plz mark brainliest 30 points1) 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?

Which compound contain an iron with a 3+ charge