Select the correct answer.

Which element has three unpaired electrons in its p orbital?

A.

carbon (atomic number 6)

B.

oxygen (atomic number 8)

C.

nitrogen (atomic number 7)

D.

beryllium (atomic number 4)

Which of the following changes will increase the amount of solid solute able to be dissolved in a liter of liquid water? decreasing pressure increasing temperature decreasing temperature increasing surface area

Which of the following would be evidence that a chemical reaction has occurred? (Select all that apply.

Which is the smallest particle into which a compound can be broken down and still remain the same compound? A. atom B. mixture C. element D. molecule

Fluorine gas and water vapor react to form hydrogen fluoride gas and oxygen. what volume of oxygen would be produced by this reaction if 7.

If something is broken into pieces will it weight more or less

A container has a volume of 200 L at 0.94 atm and 25 C. The pressure changes to 1.00 atm and the temperature changes to 0 C. What is the new volume of the container

f litmus paper is dipped in an acidic solution and then in a basic one, what will happen? The paper will turn from blue to red. The paper will turn from red to clear. The paper will turn from blue to clear. The solution will turn from red to blue.

You need to make an aqueous solution of 0.125 M barium chloride for an experiment in lab, using a 250 mL volumetric flask. How much solid barium chloride should you add?

Relative to the sum of the masses of its constituent nucleons, the mass of a nucleus is: greater the same smaller sometimes greater and sometimes smaller

Smallpox epidemic among Native Americans?