Download Test-Mole Concept

QUIZ Mole Concept
Name_____________________
Multiple Choice: Identify the letter of the choice that best completes the statement or answers the question.
_____1. 6.02 x 1023 is called _____ number.
a. Avogadro’s
b. Newton’s
c. Aristotle’s
d. Planck’s
_____2. There are 6.02 x 1023 atoms in one ____ of atoms.
a. mole
b. Newton
c. amu
d. kilogram
_____3. The mass in grams of one mole of any pure substance is called its ____ mass.
a. atomic
b. formula
c. molar
d. molecular
_____4. If 24 g of carbon is measured on a balance, how many atoms have been indirectly counted?
a. 2
b. 24
c. 6.02 x 1023
d. 12.04 x 1023
_____5. Which element has a molar mass of 31 g/mole?
a. Potassium
b. Phosphorus
c. Gallium
d. Palladium
_____6. Which is the mass of an atom of calcium?
a. 20 amu
b. 20 g
d. 40 g
Isotope
c. 40 amu
Mass (amu)
28
X
29
X
32
X
Abundance
27.98
92.21%
28.94
4.70%
29.97
3.09%
7. Using the table above determine the average atomic mass of the element and then use the periodic table to
determine the identity of the element.
Average atomic mass ___________________
The element is_________________________
8. Fill in the following table with the correct information
Element
Symbol
Atomic
Number
Boron-11
Boron-10
Mass
Number
Number of
protons
Number of
neutrons
11
5
10
5B
Zinc-66
Number of
electrons
30
36
Directions: Solve the following problems. Show all work and round answers to the correct number of significant digits in
order to receive full credit. Record final answer on line
_______________9. Calculate the number of atoms in 4.0 moles of helium.
_______________10. How many grams of Chlorine are needed to have 5.0 moles of Chlorine?
_______________11. How many moles of Ag contain 4.49 x 1023 atoms?
_______________12. How many moles of phosphorus are present in 114.95 g of phosphorus?
13. Using the model of an atom above determine the identity of the atom.
This is element is __________.
BONUS:
What is the mass of 3.01 x 1023 atoms of nitrogen?