Question and answer
When magnesium carbonate, MgCO2, reacts with nitric acid, HNO3, it forms magnesium nitrate, Mg(NO3)2, and carbonic acid, H2CO3. Carbonic acid then breaks down into water and carbon dioxide. Which two
types of reactions take place in this process? A. synthesis and decomposition B. single-replacement and combustion C. double-replacement and decomposition D. double-replacement and combustion
C. double-replacement and decomposition
Get an answer
Original conversation
User: When magnesium carbonate, MgCO2, reacts with nitric acid, HNO3, it forms magnesium nitrate, Mg(NO3)2, and carbonic acid, H2CO3. Carbonic acid then breaks down into water and carbon dioxide. Which two types of reactions take place in this process? A. synthesis and decomposition B. single-replacement and combustion C. double-replacement and decomposition D. double-replacement and combustion

Weegy: C. double-replacement and decomposition
cha97mw|Points 1097|

User: For the chemical reaction C2H6 + 137 kJ ? C2H4 + H2, the chemical energy of the A. reactant is greater than the chemical energy of the products. B. products is greater than the chemical energy of the reactant. C. reactant and the chemical energy of the products are equal. D. reaction is conserved.

Weegy: B. [ products is greater than the chemical energy of the reactant. moles = mass / molar mass moles HBr = 186 g / 80.908 g/mol = 2.3 moles TRUE C2H6 + 137 kJ - - -> C2H4 + H2 You can see that the energy (137 kJ) is on the reactant side of the equation. So you have to put energy into the reaction to to form the prodicts. Therefore the products must have a higher energy then the reactants = B ]
Expert answered|dennis003|Points 170|

Question
Asked 7/2/2012 12:53:37 PM
0 Answers/Comments
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
For the chemical reaction C2H6 + 137 kJ ? C2H4 + H2, the chemical energy of the A. reactant is greater than the chemical energy of the products. B. products is greater than the chemical energy of the reactant. C. reactant and the chemical energy of the products are equal. D. reaction is conserved.
Weegy: B rasing temp is equivalent to adding heat and by La Chat rnx shifts to right User: For the chemical reaction C2H6 + 137 kJ ? C2H4 + H2, the chemical energy of the A. reactant is greater than the chemical energy of the products. B. products is greater than the chemical energy of the reactant. C. reactant and the chemical energy of the products are equal. D. reaction is conserved. Weegy: D. reaction is conserved. (More)
Question
Expert Answered
Asked 7/2/2012 1:26:21 PM
0 Answers/Comments
17,196,734 questions answered
Popular Conversations
Consider this quote: "In each of these historical instances . . . ...
Weegy: D. it stands for the omission of only a single word. User: Which of the following statements correctly ...
9/1/2014 8:30:28 AM| 2 Answers
The invasion of this region temporarily halted the fighting between ...
Weegy: The invasion of A.Korea halted the the fighting between the KMT and CPC. User: The letters DMZ stand for ...
9/1/2014 3:12:20 PM| 2 Answers
what is a complex sentence
Weegy: User: what is a simple sentence Weegy: User: what is a compound sentence Weegy: A compound sentence ...
9/1/2014 5:04:39 PM| 2 Answers
Every set of three points is coplanar.
9/1/2014 7:59:14 PM| 2 Answers
In a market without price controls, producers can charge the _____, ...
Weegy: In a market without price controls, producers can charge the EQUILIBRIUM PRICE, so that consumers will buy all ...
9/2/2014 7:29:00 AM| 2 Answers
Weegy Stuff
S
L
1
L
Points 218 [Total 6751]| Ratings 0| Comments 218| Invitations 0|Offline
S
L
C
P
C
1
L
L
Points 159 [Total 16098]| Ratings 1| Comments 149| Invitations 0|Offline
S
R
L
1
1
P
C
1
P
1
1
L
P
C
P
C
1
P
C
L
P
C
1
P
C
P
C
Points 117 [Total 24516]| Ratings 0| Comments 117| Invitations 0|Offline
S
L
P
C
P
C
1
L
P
C
L
P
C
P
C
P
C
P
C
Points 73 [Total 18604]| Ratings 0| Comments 73| Invitations 0|Offline
S
L
1
1
1
1
L
1
Points 71 [Total 9851]| Ratings 0| Comments 71| Invitations 0|Offline
S
L
P
C
L
P
C
P
C
L
P
C
P
C
P
C
Points 54 [Total 17226]| Ratings 0| Comments 54| Invitations 0|Offline
S
Points 29 [Total 699]| Ratings 0| Comments 29| Invitations 0|Offline
S
1
L
1
L
P
P
L
Points 25 [Total 11271]| Ratings 0| Comments 25| Invitations 0|Offline
S
P
C
L
P
L
1
Points 24 [Total 6081]| Ratings 1| Comments 14| Invitations 0|Offline
S
1
L
L
Points 21 [Total 5145]| Ratings 0| Comments 21| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.