Which of the following chemical equations is not correctly balanced?
n2 + h2 --> 2 nh3
hcl + nahco3 --> co2 + h2o + nacl
c2h5oh + 3o2 --> 2co2 + 3h2o
4nh3 + 5o2 --> 4no + 6h2o

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.