5.
A swimming pool contains 2500 m³ of water with a density of 1000 kg/m³ at
10° C. The water in the pool is heated to 20 °C and expands by 5.25 m³.
al Calculate the mass of the water in the swimming pool at 10 °C.
b Use the particle model to explain why the water expands.
c Will the density of the water increase or decrease when it is heated? Explain
your answer.
d Calculate the new density of the water after it has been heated.

Desperately need (d) to be solved with working out and explanation. Ty