The word equation “magnesium reacts with chlorine to produce magnesium chloride” would be represented by which of the following formula equations?
NMAT MASTERCLASS - EXAM 4

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Chemistry
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Professional Development
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Medium
JAY ROBERT LACEDA
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15 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Mg --> Cl2 + MgCl2
MgCl2---> Mg + Cl2
MgCl2 + Mg ---> Cl2
Mg + Cl2 ---> MgCl2
2.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
In balancing a chemical equation, which of the following are you allowed to do?
change subscripts
change superscripts
write coefficients
add new substances
3.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Which of the following symbols means a substance is in water solution?
(s)
(l)
(aq)
(g)
4.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
What is the general form for a single-replacement reaction?
A + B ---> AB
AB -----> A + B
A + BX ---> AX + B
AX + BY --> AY + BX
5.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
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
6.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
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
7.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
What is the expected product if sodium metal reacts with oxygen gas?
NaO
Na2O
NaO2
Na2O2
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