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

1. A balloon with a fixed amount of air is at room temperature. The balloon is placed in a pan of hot water. • Describe what happens to the balloon in the hot water.

Mixtures have (exact, relative) amounts of the same substances

How is continental crust different from oceanic crust?

What type (s) of intermolecular forces are expected between seh2 molecules?

Explain why an aqueous solution of Na2SO4 is neutral while an aqueous solution of Na2CO3 is basic in nature?

Rank the following substances in order from most soluble in water to least soluble in water: ethane, C2H6; 2-butanol, C4H9OH; potassium chloride, KCl; and propane, C3H8.

What information can be learned about the element chlorine (Cl) by looking at the periodic table? Select all that apply. chlorine has 35.45 protons chlorine has 35.45 neutrons chlorine has 17 protons chlorine has 17 electrons

Zn (s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g) When combining zinc metal with hydrochloric acid, you notice that you run out of zinc and still have plenty of hydrochloric acid to continue the reaction. What is the term used to describe the zinc?

Engineers increase output in crop production by combining the strengths of two plants. This can be done by using one plant to pollinate a different plant so that their strengths are combined into a new plant. What is this technique called?

Using the first volume and temperature reading on the table as V1 and T1, solve for the unknown values in the table below. Remember to use the rules of significant figures when entering your numeric response. A: B: C: D: A 2-column table with 5 rows.