Use a magnet to separate the iron from the sand.
Answer: 35 g/cm
Explanation:
Density equals mass over volume. 525 divided by 15 is 35
Given teh equation adn the heat of reaction, reaction 2's heat of reaction can be obtained by simply multiplying teh heat of reaction of 1 by 3. The final answer is -6129 kJ.
I believe d is the correct answer
Determining on the temperature, ice could melt, water could freeze or evaporate. Just an example.