Which of these is a pure substance?

A-iced tea

B-sugar

C-ocean water

D-a penny

I think it's sugar but I don't know

2. What is critical mass?

Which statement about the density of warm water is most likely correct? Warm water is more dense than cold water. Warm water is less dense than cold water. The density is the same for warm and cold water.

Which of the following is the electron configuration for an electrically neutral atom of beryllium (Be) ? 1s^2 2s^2 1s2^2s2^2p^6 1s^22s^22p^4 1s^22s^22p^44d^2

2. How many grams of sucrose would be needed to prepare 100. mL of a solution of 0.10 M sucrose? Show your calculations.

If the concentration of brown sand is 2.0 ppm, how many grains of brown sand are in the bucket?

Lithium (Li) and oxygen (O) are both in period 2. They both have? a. similar properties b. the same number of protons c. two electron shells d. the same number of electrons

What compares a law and a theory?

Explain what domain would best be represented by the "?" in the diagram. A) Eukarya because the organisms are all eukaryotic. B) Eukarya because the organisms are all prokaryotic. C) Bacteria because some of the organisms are autotrophs.

If you are eating a hamburger, it is an example of a consumer eating another consumer. a) true b) false

What mass of NaNO3 is needed to make 3.5 L of 2.2 M solution? (Na = 23.0g, N=14.0g, O=16.0g) Explain in steps