The atomic number of nitrogen is 7. Nitrogen-15 is heavier than nitrogen-14 because the atomic nucleus of nitrogen-15 contains how many neutrons?

A student measuring the pH of the water in a fish tank found it to have a pH of 8. Which of the following statements is true regarding that solution?

Which term best describes the water component of a sugar- water mixture?

Which of the following observations is the strongest argument in favor of the hypothesis that protein structure and function are correlated?

Specifically, a peptide bond forms between which two functional groups?

Which of the following statements regarding carbon is false?

You drop a handful of salt into a glass of water. Which of the following BEST describes what is happening inside the glass at the molecular level?

Research indicates that Ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that

Imagine that in 2025 you are the top biologist at a research station studying biodiversity in Costa Rica. A young scientist brings you a sample from a previously unexplored site. She asks you to look at the sample and determine whether it indeed contains microscopic, living organisms. As you begin your investigations, you must first decide what characteristics distinguish life from nonlife. How would you differentiate a living organism from nonliving? (5pts)

Phosphorus has an atomic number of fifteen, so what will be the distribution of its electrons?