Which one is a true statement about exothermic reactions?

a. the reactions have more heat energy than products.

b. more heat is given off than is put into the reaction.

c. energy from an outside source is continuously being added.

d. the reaction container always feels cold.

Suppose you got a low yield of benzoin from your benzoin condensation reaction and thus only have 0.300 g of benzoin to use as the starting material for this reaction. how much concentrated nitric acid should you add? (concentrated nitric acid is 15.8 m). write your answer in the form x.xx ml

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.