A student prepares a mixture of sugar and coffee. The sugar seems to disappear as it mixes with the coffee.
Is this mixture homogeneous or heterogeneous?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

What happens to the temperature of a substance when the average kinetic energy of its particles increases?