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Decomposition and Synthesis Reactions

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Question 1 (Essay)

Write the complete balanced equation for the reaction between barium metal (Ba) and nitrogen gas (N2). You do not need to make the subscripts smaller; just write them out as regular numbers. For example: N2.

Question 2 (Multiple Choice)

Which of the following is a product formed when NaCl decomposes?

Na2
Cl
NaC
Cl2

Question 3 (Multiple Choice)

What do all decomposition reactions have in common?

They all produce water (H2O) as one of the products.
They all produce individual elements as the final products.
They start with more active reactants and end with less active products.
They start with one reactant and end with more than one product.

Question 4 (Multiple Choice)

Which of the following combinations of reactants will result in a synthesis reaction?

Cl2 + HBr
Ca + H2O
MgO + H2O
C2H2 + O2

Question 5 (Multiple Choice)

Which of the following is a synthesis reaction?

2H2O yields 2 H2 + O2
H2 + Cl2 yields 2 HCl
2Li + CaO yields Li2O + Ca
CH4 + 2 O2 yields CO2 + 2 H2O

Question 6 (Multiple Choice)

Which of the following is a product formed when K reacts with Cl2?

KCl
K2Cl
KCl2
K2

Question 7 (Multiple Choice)

Which of the following compounds will produce H2O as one of the products when it decomposes?

Cu(OH) 2
Hg(ClO3)2
MgCO3
CaO

Question 8 (Essay)

Write the complete balanced equation for the decomposition of Al(ClO3)3. You do not need to make your subscripts smaller; just write them out as regular numbers. For example: Al(ClO3)3.

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Solution Summary

This solution offers answer to some multiple choice questions on decomposition and synthesis, with adequate explanations wherever needed.

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Answer to 614717
4.4 chem help
Question 1 (Essay)
Write the complete balanced equation for the reaction between barium metal (Ba) and nitrogen gas (N2). You do not need to make the subscripts smaller; just write them out as regular numbers. For example: N2.
3 Ba(s) + N2(g) = Ba3N2(s) Barium nitride
Question 2 (Multiple Choice)
Which of the following is a product formed when NaCl decomposes?
Na2
Cl
NaC
Cl2
The correct answer is Cl2 (fourth option). Third one is a carbide, nascent chlorine does not form (second option) and sodium is not diatomic (first option).
Question 3 (Multiple Choice)
What do all decomposition reactions have in common?
They all produce water (H2O) as one of the products.
They all produce individual ...

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