Iam currently practicing for chemistry finals, and i came along this can someone explain why the answer is one and not three? i dont undersatnd why the density is the same. -- the question and the correct answer are shown in the picture

The density of properties will not increase by changing the amount of materials, but only will change if temperature changes because it is the weight per cubic centimeter. For example if you have 20000 grams of gold and its volume is 1040 cubic centimeters, but you also have 550 grams of gold which has a volume of 28.5 cubic centimeters the calculations prove it;

20,000/1040= 19.2 grams per cubic centimeter

as well as 550/28.5= 19.2 grams per cubic centimeter.