One isotope of nitrogen has 7 protons and 8 neutrons. Which is the correct reference for this isotope?

A.

nitrogen-15

B.

nitrogen-8

C.

nitrogen-7

D.

nitrogen-1

An empty beaker is weighed and found to weigh 23.1 g. Some potassium chloride is then added to the beaker and weighed again. The second weight is 24.862 g. What is the mass of the potassium chloride

What is meant by solvation? nonpolar solute surrounded by polar solvent polar solute surrounded by nonpolar solvent ionic solute surrounded by nonpolar solvent ionic solute surrounded by polar solvent

If you had to pick one organelle that was the most important, which one would you pick? Why would you pick that one?

Given that kb for (ch3) 3n is 6.3 * 10-5 at 25 °c, what is the value of ka for (ch3) 3nh at 25 °c?

Are these compounds - methane and CH4 ionic or covalent?

True or False: DNA is our genetic make-up. It is why we have a certain eye color, and hair color, etc.

Which hybrid orbitals would be formed if one s orbital and three p orbitals combined?

The way light bounces off a minerals surface is describe by the minerals

Physical properties can be used to describe matter. Some properties are dependent on the amount of matter present. All BUT ONE of these physical properties changes with the amount of matter. That is A) density. B) mass. C) volume. D) weight.

Which term best describes the substances that cause oil and water molecules in salad Dressing to interact and mix? surfactants miscible liquids immiscible liquids compressed molecules