Which task most likely involves a calculation that uses moles?
determining the number of atoms in a jar of liquid
Which substance has the greatest molar mass?
sodium chloride
Which statement best describes the relationship between the substances in the equation? Na+ + Cl- NaCl
The number of sodium ions is equal to the number of formula units of salt.
How many atoms of aluminum are present in a sample that has a mass of 155.30 g?
3.47 x 10^24
Which statement best describes a mole?
It is used for directly comparing the amounts of substances.
In a classroom, which comparison would a teacher most likely use for describing a mole?
a dozen eggs and a dozen jellybeans
Which value gives the number of particles in 1 mol of a substance?
6.02x 10^23
If the molar mass of sodium nitrate (NaNO3) is calculated to be 85.00 g/mol, how many formula units are present in 11.0 g of sodium nitrate?
7.79 x 10^22
Avogadro's number was calculated by determining the number of atoms in
12.00 g of carbon-12.
The mole concept will most likely be used in
determining how many ozone molecules are lost in the atmosphere.
