Question

1. a solvent is: (0.5 points)

a. the solid that gets dissolved in a solution
b. a solution with high concentration
c. the liquid in which a solid dissolves in a solution
d. a solution with low concentration

1. a solute is: (0.5 points)

a. the solid that gets dissolved in a solution
b. a solution with high concentration
c. the liquid in which a solid dissolves in a solution
d. a solution with low concentration

1. the image to the right is an example of a:

a. mole
b. conversion factor
c. percent composition
d. molarity

1. the molar mass of no₃ is

a. 30.01 g
b. 14.01 g
c. 16.00 g
d. 62.01 g

1. the first step in dimensional analysis is:

a. write down what you know
b. write the known units in the bottom
c. write the units you are trying to get to up top
d. multiply the known by the conversion factor

1. the empirical formula shows the:

a. atoms present in a certain molecule
b. lowest whole number ratio of the atoms in a compound
c. percent, by mass, of each element in a compound
d. concentration in moles per liter

1. avogadros number is equal to (select all that apply)

a. the molar mass of the element
b. the number of atoms in 1 mole of an element
c. 6.02 x 10²³
d. the concentration of atoms in a compound

Explanation:

1. A solvent is the liquid in which a solid dissolves in a solution.
2. A solute is the solid that gets dissolved in a solution.
3. \(6.02\times10^{23}\) representative particles is 1 mole (definition of mole).
4. Molar mass of \(NO_3\): \(N = 14.01\ g/mol\), \(O = 16.00\ g/mol\), so \(14.01+(3\times16.00)=62.01\ g/mol\).
5. First step in dimensional analysis is to write down what you know.
6. Empirical formula shows the lowest whole - number ratio of the atoms in a compound.
7. Avogadro's number is \(6.02\times10^{23}\) and it is the number of atoms (or particles) in 1 mole of an element.

Answer:

1. c
2. a
3. a
4. d
5. a
6. b
7. b, c