What is the mole fraction of oxygen gas in air (see table 5.3 in the textbook) ? express your answer using two significant figures?

Mass is 5 grams and the volume is 4.5 grams what is the density

How can scientists best confirm and validate the results of an experiment so they can publish their findings?

Breaking bonds requires what type of energy flow?

Which of these is an acid? A. water B. lye C. NaOH D. vinegar My best guess would be A. What do you think?

Which term describes the unstable arrangement of the reacting particles as the reaction takes place? reactants activation energy products energy of reaction activated complex

What does it take to prove a hypothesis false? O A. It is impossible to prove a hypothesis false O B. At least ten examples O C. One counterexample O D. A poorly stated question

We dissolve 5g of sugar, C12H22O11, in water to make 1L solution. What is the concentration of this solution expressed as molarity.

Explain how the molar mass of a gas affects the rate at which the gas diffuses and effuses

Wat is a redox reaction

What is the difference between an organic and inorganic molecule