EASY
AS and A Level
IMPORTANT
Earn 100
This question is about gases.
Helium is a noble gas. It exists as single atoms. Explain why:
helium has a very low boiling point
Helium is a noble gas. It exists as single atoms. Explain why:
Important Questions on States of Matter
EASY
AS and A Level
IMPORTANT
This question is about gases.
Helium is a noble gas. It exists as single atoms. Explain why:
helium does not conduct electricity.
EASY
AS and A Level
IMPORTANT
This question is about gases.
A weather balloon contains 0.500 Kg of helium. Calculate the volume of the gas in the balloon at a pressure of
0.500 × 105 Pa and a temperature of -20.0 °C.
(R = 8.31 JK–1mol–1; Ar He = 4.0)
EASY
AS and A Level
IMPORTANT
Water and bromine are both simple molecular substances. Both water and bromine form a lattice structure in the solid-state.
What do you understand by the term lattice?
EASY
AS and A Level
IMPORTANT
Water and bromine are both simple molecular substances.
The boiling point of water is 100°C. The boiling point of bromine is 59°C. Explain the reason for this difference in terms of intermolecular forces.
EASY
AS and A Level
IMPORTANT
Water and bromine are both simple molecular substances.
Use ideas about the kinetic theory to explain what happens when liquid bromine evaporates to form bromine vapour.
EASY
AS and A Level
IMPORTANT
Water and bromine are both simple molecular substances.
When 0.20 g of a liquid, Y, with a simple molecular structure was evaporated it produced 80 cm3 of vapour.
The temperature was 98 °C and the pressure 1.1 × 105 Pa. Calculate the relative molecular mass of Y.
(R = 8.31 JK–1mol–1)
EASY
AS and A Level
IMPORTANT
The uses of metals are often related to their properties.
Describe the structure of a typical metal.
EASY
AS and A Level
IMPORTANT
The uses of metals are often related to their properties.
Explain why metals are malleable.
