Question

A cube of ice melts in a beaker to form 10 g of water. What is the best estimate of the mass of the ice cube?

2 g
5 g
10 g
15 g

Answer 1

it will be 5g the form is 10g split it 5g

Answer 2

I think the answer is 10g
when you freeze a specific amount of water into an ice cube, only the form and the density is changed, while the mass will be pretty much the same.
Probably the mass of the melted water will be a little bit less than the cube (if count the mass that released to the air) , but the amount will NOT BE SIGNIFICANT.