3. What determines the mass number of an element?

The mumhor of nrotons

How much water is in 200ml of milk

The hydrogen halide gases all have the same general formula, HX, where X can be a halogen (F, CI, Br, or I). HCl 2 effuses times faster than one of the others, which one is it; HF, HBr or HI?

Science is a way of learning about the natural world that is based on what?

A centimeter an millimeter differ from each other by a factor of?

8. What must occur for osmotic forces to cease across a cell membrane? A. Equilibrium. B. Diffusion. C. Dehydration D. Active transport.

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