Does a liquid release energy or absorb energy when it changes into a gas? into a solid?

In a chemical reaction the physical states of each chemical species is denoted by a state symbol. Each state is represented by a lower case letter in parenthesis after the formula.

A 500 gram piece of metal has a volume of 2.75 cm3. what is the density

What is formed when amino acids form long chains?

What will happen if a peeled banana is put on a hotplate?

What is the name of the tissue that connects and supports the parts of the body?

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.