A chemist reacts 24.0 grams of carbon with 24.0 g of oxygen to get 42.0 g of a gas, along with some leftover carbon. In another experiment, she reacts 30.0 grams of carbon with 40.0 grams of oxygen to get 70.0 g of a gas. Are the two gases the same?

What is the molecular formula of a hydrocarbon with m+ = 166? (write the formula with no subscripts, e.g. c4h10.) what is the sum of rings and double bonds in this compound?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

What is the mass of 0.46 mol of mgcl2