Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) 2.0 moles of NO contains the same number of oxygen atoms as 1.0 mole of CO₂.
(2) The coefficients in a balanced equation give the fixed molar ratios between reactants and products.
(3) Avogadro's number is an experimentally determined quantity.

Question

Quizplus · Accepted Answer

1) TRUE - Both NO and COS have 1 oxygen atom per molecule, but 2 moles of NO will have twice the number of oxygen atoms as 1 mole of COS, since 2 moles of NO contain 4 oxygen atoms while 1 mole of COS contains 1 oxygen atom.
2) TRUE - This is the definition of a balanced equation.
3) TRUE - Avogadro's number is defined as the number of atoms in exactly 12 grams of carbon-12, which is an experimental value that has been determined through various methods such as X-ray crystallography and gas density measurements.

Characterize EACH of the Three Given Statements as Being TRUE