What is the atomic number of calcium?
Module 2: Compounds and how they interact

Quiz
•
Chemistry
•
University
•
Medium
Hannah Hathaway
Used 5+ times
FREE Resource
20 questions
Show all answers
1.
MATH RESPONSE QUESTION
2 mins • 1 pt
Mathematical Equivalence
OFF
2.
MATH RESPONSE QUESTION
2 mins • 1 pt
What is the molar mass of SF6?
You will need your periodic table to answer this question.
Mathematical Equivalence
ON
Answer explanation
Use your periodic table to find the atomic mass of sulfur and fluorine. Recall that atomic mass is the larger number that is usually written as a decimal.
3.
MATH RESPONSE QUESTION
2 mins • 1 pt
What is the molar mass of H2O2?
You will need your periodic table to answer this question.
Mathematical Equivalence
ON
Answer explanation
Use your periodic table to find the atomic mass of hydrogen and oxygen. Recall that atomic mass is the larger number that is usually written as a decimal.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A problem asks how many grams are in 0.85 mol of NaCl.
Which option correctly sets up this problem?
The molar mass of NaCl is 58.443 g/mol
Answer explanation
The key info you need from the problem is that you are starting with mol NaCl and want to end with grams NaCl. The problem tells you the molar mass of NaCl in g/mol, which is the one step in your path.
What you start with always goes first (0.85 mol), and then what does up must come down, so we must put mol NaCl on the bottom of the fraction. This way, the mol cancels out and we are left with units of g, which is what we wanted. Yay!
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A cup of coffee contains 4.89 x 10-4 mol of caffeine. How many molecules of caffeine is this?
Answer explanation
6.
MATCH QUESTION
1 min • 1 pt
Match the examples to the type of chemical reaction
Fe2O3 + Al -->
Al2O3 + Fe
Single replacement
NH4Cl -->
NH3 + HCl
Decomposition
NaCl + AgNO3 -->
AgCl + NaNO3
Combination
Fe + Cl2 -->
FeCl2
Double replacement
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Type of chemical reaction that involves the joining of two substances to form one compound
Single replacement reaction
Double replacement reaction
Combination reaction
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