In the reaction c7h16+ o2 --> 8h2o + 7co2, what coefficient should be replaced in front of o2 to balance the reaction? 7. 8. 11. no coefficient is needed.

What overall charge must all compounds have

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?

What is conserved in the reaction shown below? h2(g) + cl2 (g) --> 2hcl(g)a. mass onlyb. mass and moles onlyc. mass, moles, and molecules onlyd. mass, moles, molecules, and volume