One liter of air contains about 0.21 L of oxygen. When filled, the human lungs hold about 6.0 L of air. How much oxygen is in the lungs when they are filled with air? (Round off to the nearest hundredths place.)

What is the maximum amount in moles of P2O5 that can theoretically be made from 235 g of P4 and excess oxygen?

Give an example of solution. Explain why it is a solution and how it is formed.

How are elements group into families

What happens to the water molecules when heat is added?

Imagine a solution of two liquids in whichthe molecules interact less favorably than they do in theindividual liquids. Will this solution deviate positively from, deviate negativelyfrom, or ideally follow Raoult's law? a. It will deviate positively.

A buffer solution is made that is 0.417 M in and 0.417 M in. If for is, what is the pH of the buffer solution? pH = Write the net ionic equation for the reaction that occurs when 0.120 mol is added to 1.00 L of the buffer solution.

BaCl2 (aq) + AgNO3 (aq) → Express your answer as a chemical equation. Enter noreaction if no precipitate is formed.

Make a list of physical changes and chemical changes that you observe or see effects of in the school

Which equation obeys the law of conservation of mass? H2 (g) + O2 (g) → H2O (g) H2 (g) + O2 (g) → H2O (g) + 4He (g) 2H2 (g) + O2 (g) → 2H2O (g) H2 (g) → H2O (g) H2 (g) + O2 (g) → 2H2O (g)

Which statement is true about sodium chloride (NaCl) ? It is a salt because it decreases the concentration of metallic ions. It is an acid because it is formed by the reaction of a salt and an acid.