What dose it mean to say that mass is conserved during a physical change?

what is the color of a fabric that absorbs electromagnetic radiation of wavelengths between 400 and 500nm

Sulfur oxides Carbon monoxides Chlorofluorocarbons (CFCs) Nitrates are responsible for the hole in the ozone layer.

What is the volume of a solution that has a specific gravity of 1.2 and a mass of 185 g?

Why are numbers placed before the elements and molecules in a chemical equation?

Give 3examples of an element, define

In the reaction of magnesium with oxygen gas, a considerable amount of energy was released. This is an example of an exothermic reaction.

Why does an air bubble rise to the surface of a glass of water?

What term expresses the ratio of moles of reactants and products according to the coefficients in the balanced chemical equation? A) mole ratio B) reactant ratio C) product ratio D) yield ratio E) none of the above

What are some examples of kinetic energy

Under which conditions would the solubility of a gas be greatest? high pressure and high temperature high pressure and low temperature low pressure and high temperature low pressure and low temperature