C I hope I help good luck
One isotope differs from another in the number of neutrons they have.
Answer: 1.67 kg
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q = Heat absorbed=
=
(1kJ=1000J)
m= mass of substance = ?
c = specific heat capacity = 
Change in temperature ,
Putting in the values, we get:

(1kg=1000g)
Thus the mass (in kg) of the copper sample is 1.67
Water is your answer!!!!!!!!!
Hi, the temperature of water is not a physical characteristic because it does not tell us a lot about the substance.