WorksheetsUnit 3 Semester
Total questions: 20
Worksheet time: 1hrs 16mins
Name for Hg2S
mercury (IV) sulfide
mercury (III) sulfide
mercury (II) sulfide
mercury (I) sulfide
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
4, 5
1, 6
3, 8
2,2
_CH4 + _O2 --> _CO2 + _H2O
What are the correct formulas and coefficients for the products of the following CSR?
Mg + Al(OH)3 →
No Reaction
Al + Mg(OH)3
Al + Mg(OH)2
MgAl + (OH)3
What type of chemical reaction is this one?
Al(OH)3 --> Al2O3 + H2O
Decomposition
Combustion
Synthesis
Single Replacement
If an element is diatomic it should have a subscript of___, when
Balance and predict the products for the following reaction:
CaO -->
CaO --> Ca + O2
2 CaO --> 2 Ca + O2
CaO --> Ca + O
2 CaO --> Ca2 + O2
Without balancing the final equation, predict the products for the synthesis reaction: Li + Cl2 → ?
LiCl2
LiCl
Li2Cl2
Li2Cl
Without balancing, write the proper chemical equation for this reaction:
Solid magnesium is burned in oxygen gas to produce solid magnesium oxide.
Mg + O2→ MgO (aq)
Mg+ O→ MgO (s)
Mg + CO2 → MgO (s) + C
Mg + O2→ MgO (s)
Solid sodium reacts with chlorine gas to produce sodium chloride crystals. Write and balance the chemical equation.
NaCl (s)→ Cl(g) + Na(s)
Na (s)+ CO2 (g)→ NaCO2 (s)
Na (s) + Cl2 (g)→ NaCl (s)
Na (g) + Cl (s) → NaCl (s)
How many moles are in 98.3 g of Aluminum Hydroxide (Al(OH)3)?
78.0 mol
1.30 mol
6.60 mol
5.90 mol
How many molecules are there in 5.9 moles of NaCl?
3.5x1024molecules
9.79x10-24molecules
1.02x1023molecules
How many moles are in 8.30 X 1023 molecules of H2O?
1.38 X 1023 moles H2O
1.38 moles H2O
2 moles H2O
1 mole H2O
To melt the ice, Juan throws 455 g of calcium chloride, CaCl2 on his sidewalk. How many moles of CaCl2 did he throw?
50,500 moles
4.10 moles
7.56 x 10-22 moles
111 moles
