Suppose that 100 grams of water at 50.0°C is placed in contact with 200 grams of iron at 30.0°C. The final
temperature is 46.5°C. The specific heats of water and iron respectively, are 4.18 and 0.45 joules per gram times
Celsius. How much heat energy did the iron gain?
1.500
12,000J
21.000
1.000J

The answer would be 1.5 kJ.

Explanation:

When you use the equation q = m x c x ∆T you will be able to find the energy gained or lost. The data for the water in this case is just there to distract you so ignore it. :D

a is the answer to this question

explanation:

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.