What occurs when a substance melts

What is the deferent between formic acid and methanoic acid

In order to boil, a liquid's vapor pressure must be greater than the pressure of the atmosphere. TRUE FALSE

Sarah and her friend see a sign for gas at exit 5. The next exit is 70 mi away. If they have one fifth of a tank of gas, should they get gas at exit 5 or can they wait for the next exit

Consider the reaction below. Mg (s) + 2HCl (aq) - - > H2 (g) + MgCl2 (aq) What is the most likely effect of an increase in pressure on this reaction? The reactant surface area increases. The reaction rate decreases.

What chemical element each period ends with?

Calculate the maximum mass of carbon dioxide that could be obtained by adding excess hydrochloric acid to 15 g of calcium carbonate.

True or false: during dry weather, the water level in a small pond drops because of runoff.

Bradley hit a baseball with a bat. The baseball then hit a window and caused the window to break. Where did the energy that broke the window come from?

An observation which requieres measuresment is called

In the equation Mg (s) + O2 (g) → MgO (s) what is the reactant?