What are C-12, C-13, and C-14 called? How many protons are in C-12? C-13? C-14?
How many electrons are neutral in C-12? C-13? C-14?
How many neutrons are in C-12? C-13? C-14?
What is atomic mass?

Gasoline has a density of 0.740 g/ml. if you have 328 grams of gasoline, what is the volume in milliliters?

What is bromine+calcium iodide--> calcium bromide +iodine balanced

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.