Which quantities must be conserved in all chemical reactions?

1) mass, charge, density

2) mass, charge, energy

3) charge, volume, density

4) charge, volume, energy

In which laboratory process is a volume of solution of known concentration used to determine the concentration of another solution? (1) deposition (2) distillation (3) filtration (4) titration

Is an elements reactivity determined by the number of protons found in an atom of the element

An atomic mass unit is equal to

Name the following chemical compound. be (no3) 2

Which of the following is not a correct statement regarding the energy in a chemical bond? It is stored between atoms. It is known as bond energy. It is energy associated with motion. It has a fixed quantity.

Why does the body of the bird covered with feathers?

One molecule of caffeine contains 8 atoms of carbon, 10 atoms of hydrogen, 2 atoms of oxygen, 4 atoms of nitrogen. write the formula for caffeine with the elements in the order they are given.

A piece of magnesium metal is heated in the presence of chlorine gas, and a reaction takes place. What compound will most likely be produced? A. Mg2C1 B. MgCl3 C. MgCl2 D. MgCI

What is the pressure of the gas in this mercury manometer if h = 81 mm and atmospheric pressure is 749 mmHg

A microscope containing two or more lenses is an