What is the mass number of an atom with 3 protons and 4 neutrons and 3 electrons

Why can't liquid change volume but gas can

If Na2SO4 were to dissolve in water, how many ions per molecule would be formed?

Which of the following has almost no mass? Select one: a. proton b. neutron c. electron

Which of the following has the greatest mass, in grams? a. 1 atom of lead (Pb) b. 0.5 mol copper (Cu) atoms c. 0.3 mol gold (Au) atoms d. 25 atoms of mercury (Hg)

In a solution of sugar, we used 500ml to make 50g/l solution. How much sugar was used?

Normal cellular pH has a hydrogen concentration of 3.98 x 10-8 M. what is the pH of a cell

What is evaporation? Describe what happens at the molecular level during evaporation.

Write is the chemical formula for calcium and chlorine

Using EDTA as the titrant and a free metal in solution is called a direct titration. This can be measured using an indicator that changes color when the metal is no longer in solution.

What is the relative formula mass for ammonium sulphate