Which is the correct chemical equation for the following statement? "Sodium reacts with oxygen in a 2 to 1 ratio to produce sodium oxide."

4Na + 2O2 → 2Na2O + O2

Na2O → 2 Na + O2

Na2 + O2 → 2 NaO

Na2O + O2 → 2 Na

A 0.229-g sample of an unknown monoprotic acid is titrated with 0.112 m naoh. the resulting titration curve is shown here. part a determine the molar mass of the acid. express your answer using two significant figures.

Why do you think the cations have an arrow and the anions have an indentation in the animation

The atoms of which element will typically form ions? A. Cl B. Ar C. Xe D. Ne

The proper name for PCl6 is phosphorus hexachloride. TRUE FALSE

Why does the foam of soap is less in well water?

Which notations represent hydrogen isotopes?

Which of the following statements is true? Question 5 options: Chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not.

2 human activities that contribute to runoff into water systems

Which of the following is an example of geographic isolation? A. a population of salmon dies out because they cannot find food. B. a zebra with a long mane moves into a population of zebras with short manes. C.

What are moles in chemistry?