Random 1
Random 2
Random 3
Random 4
Random 5
100
Which of the following substances represents an element?
1. CO
2. Ag
Ag
100
Which of the following substances represents an element?
3. HI
5. Db
5. Db
100
Which of the following substances represents an element?
4. CN-
6. Xe
6. Xe
100
Which formula shows a compound made up of THREE elements?
A MgBr2
B H2O
C LiF
D NaOH
D.
100
Which of the following models represents compounds?
A
B
C
D
B.
200
Which of the following substances represents a compound?
1. Cr
2. KF
2. KF
200
Which of the following substances represents a compound?
3. H2SO4
4. Cs
3. H2SO4
200
Which of the following substances represents a compound?
5. Al2O3
6. CaO
5. Al2O3
6. CaO
200
The names and chemical formulas of four substances are shown in the chart.
Carbonic acid H2CO3
Nitric acid HNO3
Phosphoric acid H3PO4
Sulfuric acid H2SO4
Which substance listed in the chart is made up of the most atoms?
C
Phosphoric acid
200
The table shows the chemical formulas for four substances.
Which substances have the same number of carbon atoms?
A Substances 1 and 2
B Substances 2, 3, and 4
C Substances 2 and 3 only
D Substances 1 and 3
A
Substances 1 and 2
300
2Mg + O2 
2MgO
In the equation above, how many atoms are in the oxygen molecule?
A 2
B 0
C 1
D 3
A
300
The chemical formula for baking soda, a common household chemical, is NaHCO3. How many elements are in this compound?
Record your answer. Be sure to use the correct place value.
4.0
300
Chemical CompoundsSubstanceChemical Formula
Glucose C6H12O6
Methane CH4
Ethanol C2H5OH
Hydrogen Peroxide H2O2
According to the Chemical Compounds table above, how many total atoms are in Glucose?
A 3
B 18
C 24
D 432
C
300
Glucose C6H12O6
Methane CH4
Ethanol C2H5OH
Hydrogen Peroxide H2O2
Refer to the Chemical Compounds table above. How many total elements are in Ethanol?
3.
300
How many atoms are in one molecule of baking soda, NaHCO3?
6
400
Glucose is a sugar that humans need to survive. It forms as a result of plants undergoing photosynthesis. The chemical formula for glucose is C6H12O6.
How many different elements are in glucose?
Record your answer. Be sure to use the correct place value.
3
400
Glucose C6H12O6
Methane CH4
Ethanol C2H5OH
Hydrogen Peroxide H2O2
According to the Chemical Compounds table above, how many atoms of hydrogen are in Ethanol?
A 0
B 2
C 5
D 6
D
400
Sodium sulfate (Na2SO4) is used to produce many products.
Which elements are represented in the formula?
Sodium, Sulfur, Oxygen
400
Sodium sulfate (Na2SO4) is used to produce many products.
How many atoms of each element are represented in the formula?
Na -2
S -1
O-4
400
Which elements are represented in the formula AND how many atoms of each element are represented in the formula?
5C2H5OH
Carbon - 10
Hydrogen - 30
Oxygen - 5