TRUE/FALSE QUESTIONS FOR CHAPTER 6
The empirical formula for C₆H₆ is C₃H₃.
FALSE
One mole of CO₂ gas contains 1 mole of carbon atoms and 2 moles of oxygen atoms.
TRUE
An empirical formula gives the specific number of each type of atom in a molecule.
FALSE
One hundred nickels must have the same mass as one hundred pennies.
FALSE
One mole of argon has more atoms in it than one mole of neon.
FALSE
One mole of chlorine gas has a mass of 35.45 grams.
FALSE
One mole of water contains 6.022 × 10²³ hydrogen atoms.
FALSE
One mole of zinc contains 65.39 zinc atoms.
FALSE
The chemical formula CuBr₂ indicates that this compound is composed of 1 gram of copper and 2 grams of bromine.
FALSE
The chemical formula clearly indicates the relationship between the mass of each element in the formula.
FALSE
The correct formula for calculating mass percent of X in compound XY is: Mass of X in a sample of the compound/ Mass of Y in a sample of the compound= Mass % X
FALSE
The empirical formula mass must be 25.0 if the molecular formula mass is 250 and n = 5.
FALSE
The mass of 2.0 moles of H₂O is greater than the mass of 1.0 mole of CO₂.
FALSE
The mole has a value of 6.023 × 10²².
FALSE
The number 6.022 × 10²³ is six times larger than the number 6.022 ×10²².
FALSE
A molecule that has an empirical formula of HO and a molar mass of 34.02 gram must have a molecular formula of H₂O₂.
TRUE
An empirical formula gives the smallest whole number ratio of each type of atom in a molecule.
TRUE
Avogadro's Number is 6.022 × 10²³
TRUE
C₂H₃O₂ could be an empirical formula.
TRUE
C₂H₆O₃ could be an empirical formula.
TRUE
Mass is used as a method of counting atoms.
TRUE
One mole of I₂ has more atoms in it than one mole of Na.
TRUE
One mole of copper atoms is 6.022 × 10²³ copper atoms.
TRUE
One mole of lead(II) nitrate contains six moles of oxygen atoms.
TRUE
One mole of nitrogen gas contains (2) × (6.022 × 10²³) nitrogen atoms.
TRUE
One mole of water contains 16 grams of oxygen atoms.
TRUE
The numerical value of the mole is defined as being equal to the number of atoms in exactly 12 grams of pure carbon-12.
TRUE
There are 6 grams of carbon in 22 grams of carbon dioxide.
TRUE
Two moles of cobalt atoms have a mass of 117.87 grams.
TRUE
Six grams of carbon contains 3.008 × 10²³ atoms.
TRUE
The empirical formula mass is 18.0 and the molecular formula mass is 90, therefore n = 5.
TRUE
The lighter the atom, the less mass in one mole of that atom.
TRUE
The molar mass of a compound in grams per mole is numerically equal to the formula mass of the compound in atomic mass units.
TRUE
The molar mass of a compound serves as a conversion factor between grams and moles.
TRUE
The molecular formula is equal to the empirical formula multiplied by a whole number integer.
TRUE
Water is 11.2% hydrogen by mass.
TRUE
C₂H₆O₄ could be an empirical formula.
FALSE
