Afurnace that provides heat by burning methane gas (ch4) must have the correct mixture of air and fuel to operate efficiently. what is the mole ratio of air to methane gas in the combustion of methane? air is 20% oxygen.

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?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Complete each row of the table below by filling in the missing prefix or missing exponent.