Why does the sky change colors at sunset?

1 because the sun changes colors

2 because the atmosphere reflects colors

3 because long wavelengths are scattered the least

4 because short wavelengths are scattered the least

What do we do with the h2o produced when glucose breaks down?

In two or more complete sentences describe all of van der waals forces that exist between molecules of hydrogen sulfide H2S

1. This is a physical combination of one substance dissolved in another. 2. This is a property of solid metals. Capable of being shaped or formed, by hammering or pressure. 3. This is a mixture that has different properties throughout.

Which condition will cause a reaction to occur? Check all that apply.

How much pressure would 4.85 moles of He gas exert in a 4.50 L tank at 55° C?

1. Which of the following best describes an example of pure chemistry? a) testing the effects of lower concentrations of a drug on humans b) studying chemicals containing carbon c) developing a cure for osteoporosis d) finding an antidote for a new

Problem 1: For which of the following activities might you want to hire a chemist? A. building a garage B. testing a sample of water from a well C. finding a comet D.

Why do most living things need food water and the ability to get rid of waste?

What is the effect of adding more water to the following equilibrium reaction? CO2 + H2O - > 2H2CO3

What aldol product is formed when two molecules of butanal react together in the presence of base?