What is the mass of 2500ml of pure water at 4 degree Celsius

ANSWER :-
Density = mass/volume

Mass =density × volume

At 4 degree Celsius the density of water is 1.000 g/ml

So,

Mass of 2500 ml of water = 1.000g/ml ×2500

= 2500 g

So 2500ml of water will give 2500g of water at 4 degree Celsius.

Hope it makes you clear.