Which phrase best describes a chemical reaction? A. mixing two substances B. the combustion of a substance C. forming or breaking bonds D. the decomposition of particles

What best explains the formula unit for a compound made from fluorine and hydrogen? 1. HF, because fluorine is short of one electron, and hydrogen is in excess of one electron 2.

A gas sample occupies 1.8 L at 25 C and 2.0 atm. What volume will it occupy at STP?

After doing a correct and careful recrystallization, you isolate your product by filtration. Which of the following will be present in the mother liquor? (select all that apply) a. Impurities b. Large amount of product c. Recrystallizing solvent d.

When a sample of gas is cooled, it condenses into a liquid. In which of the following ways do the molecules of the original gas sample compare with the molecules of the liquid? a. The molecules weigh less as a gas than they do as a liquid. b.

Name the bond that forms when 2 sugar molecules are covalently bonded

1. Calculate the end velocity of a rocket that traveled 16km in 2 seconds. distance time 2. Calculate the rockets acceleration m with a start velocity of 0m/s and the end velocity from #1 for 10 seconds.

How are linear and nonlinear graphs alike

Uranium nuclei split during nuclear fission true or false

Calculate the mass of 2.25*10^22tungsten atoms.

Which weathering process involves physical forces but not chemical reactions or dissolving of minerals