NEW
Font size
WorksheetsNMAT MASTERCLASS - EXAM 4
Total questions: 15
Worksheet time: 3hrs 30mins
The word equation “magnesium reacts with chlorine to produce magnesium chloride” would be represented by which of the following formula equations?
Mg --> Cl2 + MgCl2
MgCl2---> Mg + Cl2
MgCl2 + Mg ---> Cl2
Mg + Cl2 ---> MgCl2
In balancing a chemical equation, which of the following are you allowed to do?
change subscripts
change superscripts
write coefficients
add new substances
Which of the following symbols means a substance is in water solution?
(s)
(l)
(aq)
(g)
What is the general form for a single-replacement reaction?
A + B ---> AB
AB -----> A + B
A + BX ---> AX + B
AX + BY --> AY + BX
According to the law of conservation of mass, the total mass of the reacting substances is _________
Always more than the total mass of products
Always less than the total mass of products
Always equal to the total mass of the products
sometimes more and sometimes less than total mass of products
The reaction 2 KClO3 (s) -------> 2 KCl(s) + 3O2(g) is an example of what type of reaction?
Synthesis reaction
Decomposition reaction
Double replacement reaction
Combustion reaction
What is the expected product if sodium metal reacts with oxygen gas?
NaO
Na2O
NaO2
Na2O2
The symbol (s) written after a formula in a chemical equation stands for
solution
soluble
solid
synthesis
What is the product of the reaction magnesium oxide (MgO) with water?
MgO , a metallic oxide
Mg(OH)2 , a metallic hydroxide
Mg(ClO3)2 , a metallic chlorate
MgCO3, a metallic carbonate
Which type of chemical reaction typically involves an acid reacting with a base to produce salt and water?
Combustion reaction
Decomposition reaction
Neutralization Reaction
Precipitation reaction
When zinc reacts with hydrochloric acid, what gas is produced in this single replacement reaction?
Carbon dioxide gas
Hydrogen gas
Methane gas
Chlorine gas
What type of reaction is shown here?
Synthesis reaction
Combustion reaction
Decomposition reaction
Double Replacement reaction
What does the symbol Δ in a chemical equation mean?
heat is supplied to the reaction
a catalyst is needed
the reaction will form precipitate
the reaction will require light
When the equation, Fe + Cl2 -----> FeCl3, is balanced, what is the coefficient for Cl2?
1
2
3
4
The double arrow (⇌ ) symbol indicates _____.
Addition of heat to reaction.
Reversible reaction
Irreversible reaction
Addition of catalyst to reaction
