As two chemicals react, the chemical bonds between the atoms in each react and break. Then, new bonds form. We call this process a chemical change or chemical reaction.

True

False

How many protons are contained in the nucleus of the atom?

What do we mean by atmospheric pressure? What causes this pressure?

In the heating of most metal alloys, melting begins at a certain temperature and concludes at a higher temperature. In these cases, which of the following temperatures marks the beginning of melting: a. solidus b. melting c. liquidus d.

Why is metal rusty? what reaction?

2CO (g) + O2 (g) = 2CO2 (g) Caculate the number of moles of CO2 produced in 6.76 moles of CO are reacted with excess oxygen.

What is the difference between an organic and inorganic molecule

The variable that you plan to change during the course of an experiment is?

It is often necessary to prepare a dilute solution from a more concentrated solution rather than starting from a solid and just dissolving it then adding water. This technique is called serial dilution.

Zinc metal reacts With hydrochloric

In the equation: 23491Pa → 234 92U + X The X represents a