“A chemist was creating iodine chloride according to the following reaction: 2I2 + KIO3 + 6HCL —> 5ICl + KCl + 3H2O
What volume of 0.5 M hydrochloric acid would need to be addd to make 24.9g of ICl assuming the other reactants are in excess?”

How do i solve this i am completely lost

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

Ab c or d ? i’m not sure what the answer is