NS Modules 10-18

Sublimation is the change in state of a…

• liquid to a solid.

• liquid to a gas

• solid to a gas

• solid to a liquid.

Water is different from other substances because it is …

• more dense as a solid than a liquid.

• less dense as a solid than a liquid.

• more dense as a solid than a gas.

• less dense as a solid than a gas

Give ONE word/term: The spontaneous spreading of particles from an area of high concentration to an area of low concentration.

Give ONE word/term: The amount of mass per unit volume

Protons and neutrons are responsible for the ... of an atom.

• mass

• volume

• density

• size

The reactants in a chemical reaction are …

• all the substances that appear in the solid phase.

• the new substances that are formed.

• all the substances on the right side of the equation.

• all the substances on the left hand side of the equation

Write out the chemical equation for the reaction

The following volumes of oil, water and paraffin were placed in a 50 ml measuring cylinder. 10 cm3 of oil, 10 cm3 of paraffin and 20 cm3 of water. The density of oil is 0,9 g/cm3, paraffin 0,8 g/cm3 and water 1 g/cm3. Calculate the mass of paraffin that was used?

The following volumes of oil, water and paraffin were placed in a 50 ml measuring cylinder. 10 cm3 of oil, 10 cm3 of paraffin and 20 cm3 of water. The density of oil is 0,9 g/cm3, paraffin 0,8 g/cm3 and water 1 g/cm3. Is oil more or less dense than paraffin?

• more dense

• less dense