Which statement is true about oxygen?

A.

Oxygen is a halogen.

B.

Oxygen is in period 2 and Group 16.

C.

Oxygen is a noble gas.

D.

Oxygen is in period 16 and Group 4.

Select all of the following properties that are characteristics of true solutions

Anhydrous calcium chloride is used after washing your organic product with water. the purpose of this step is to:

Which of the following is a decomposition reaction? A. CH4 + 2O2 CO2 + 2H2O B. 2Mg + O2 2MgO C. CaCO3 CaO + CO2 D. 2H2O + 2Na 2NaOH + H2

An industrial chemist puts 1.40 mol each of H2 (g) and CO2 (g) in a 1.00-L container at a certain temperature. When equilibrium is reached, 0.52 mol of CO (g) is in the container.

Write the chemical formula for a compound containing: A) One calcium atom and two bromines= B) two nitrogen atoms and four oxygen atoms= C) one carbon atom and two oxygen atoms

What are three facts about the carbon family

Which characteristic might identify a substance as an Arrhenius base? A) It contains an OH group. B) It contains hydrogen ions. C) It forms halogens. D) It will react with other bases.

The combining of hydrogen and oxygen gas into liquid water is an example of what kind of change? A. Phase B. Chemical C. Physical

Explain evaporation. have a chapter test tommarow!

When the system is at equilibrium, it contains NO 2 at a pressure of 0.817 atm, and N 2 O 4 at a pressure of 0.0667 atm. The volume of the container is then reduced to half its original volume.