Every summer, Mary spent sunny days out in the sun. She never wore a hat or sunscreen. When she became a teenager, Mary started lying in a tanning bed before summer arrived. By the time Mary was 25 years old, she had begun to get small sores on her arms and shoulders.

It is very likely that Mary will end up with some form of

A)
HIV/AIDS.

B)
skin cancer.

C)
bacterial infection.

D)
Parkinson's disease.

This element exists in adundance in the sun.explain how you would go about capturing sunlight.would this captured sunlight contain any of the element?

Which statement best describes what happens when molecular compounds melt

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .