Which of the statement about subatomic particles is correct

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

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

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.