Question :
41.Characterize EACH of the three given statements as being TRUE : 1309600
41.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) Two moles of O2 molecules contain twice Avogadro’s number of atoms.
(2) The actual yield of a product in a chemical reaction is a measured rather than calculated quantity.
(3) In an equation-based “grams of A to grams of B” problem, equation coefficients become part of the first needed conversion factor.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
42.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) Six mole-to-mole relationships are obtainable from a balanced chemical equation involving two reactants and two products.
(2) The compound H2O has a greater formula mass than does the compound NH3.
(3) The atomic mass unit (amu) and the gram unit (g) are related to one another through Avogadro’s number.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
43.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) Avogadro’s number is part of the conversion factor needed to solve a “moles of A to grams of A” problem.
(2) The sum of the coefficients in the balanced equation for the production of water from hydrogen gas and oxygen gas is five.
(3) 2.00 moles of NH3 molecules have a mass of 34.0 grams.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
44.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) In balancing an equation, formula subscripts are adjusted as needed to obtain the balance.
(2) 1.00 mole of C contains the same number of atoms as does 12.0 g of C.
(3) Both a microscopic and macroscopic levels of interpretation exist for a chemical formula with the former involving atoms and the latter involving molecules.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
45.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) Carbon monoxide reacts with hemoglobin in red blood cells to produce carbon dioxide, which changes blood’s acidity.
(2) Sulfuric acid is the number two chemical in the United States in terms of production amount.
(3) The raw materials needed for industrial sulfuric acid production are sulfur, air and water.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
46.Select the correct numerical value for the atomic mass, in amu, of C.
a.12.0c.44.0
b.24.0d.88.0
47.Select the correct numerical value for the formula mass, in amu, of CO2.
a.12.0c.44.0
b.24.0d.88.0
48.Select the correct numerical value for the molar mass, in grams, of CO2.
a.12.0c.44.0
b.24.0d.88.0
49.Select the correct numerical value for the mass, in grams, of 6.02 ? 1023 atoms of C.
a.12.0c.44.0
b.24.0d.88.0
50.Select the correct numerical value for the mass, in grams, of 2.00 moles of CO2
a.12.0c.44.0
b.24.0d.88.0
