Mass, volume and density in International System of Units 0001

What are the units of mass and volume in SI? What will be the unit of density in SI?

Density of a substance 0001

The volume of 200 g of a substance is 10 L, what is its density?

Mass of reactants in a chemical equation 0001

How many grams of are needed to react with 120 g of NO, in order to obtain ?

Atomic number and atomic mass 0001

An element has atomic number 10 and atomic mass 20. How many neutrons does this element have?

Question about nucleus of the atom 0001

The nucleus of an atom is composed of uncharged particles as well as of the following:

a) Electrons

b) Protons

c) Neutrons

d) Ions