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
21,945,316 questions answered
Popular Conversations
Match the parts of the following function with their correct ...
Weegy: I'm sorry. What is your question? User: Which of the following equations could be used to solve for the ...
8/30/2015 8:34:24 PM| 4 Answers
Why is Paine's use of aphorisms important in The Crisis No. ...
Weegy: C User: Read the quotation from The Crisis, No. 1, and then answer the question. “…the harder the conflict, ...
8/30/2015 4:35:59 PM| 2 Answers
Select the adverb clause from the sentence below. As population ...
Weegy: Yes, adverbs can be used to modify other adverbs. User: Select the adverb clause from the sentence below. ...
8/30/2015 6:51:38 PM| 2 Answers
Select the adverb clause from the sentence below. Unless there is ...
Weegy: Adverbs do not modify NOUN. User: Select the adverb clause from the sentence below. Wherever there have ...
8/30/2015 7:01:02 PM| 2 Answers
By creating international and national commissions to oversee atomic ...
Weegy: c. expand the development and research of atomic plants User: This was a U.S. policy proposed by George Kennan ...
8/30/2015 7:35:08 PM| 2 Answers
2. Given the formula K = LMN, what is the formula for M? A. ...
Weegy: A. M = K/LN User: 3. Solve this equation for A: A ÷ 2 = 4 A. 8 B. 4 C. 6 D. 2 Weegy: -6 + 3x = -9 ...
8/30/2015 8:24:13 PM| 2 Answers
Weegy Stuff
S
P
C
L
P
L
1
P
P
1
P
1
P
L
P
R
Points 1322 [Total 11675]| Ratings 7| Comments 1252| Invitations 0|Online
S
L
Points 798 [Total 1113]| Ratings 1| Comments 788| Invitations 0|Offline
S
1
L
L
Points 786 [Total 9254]| Ratings 3| Comments 746| Invitations 1|Online
S
L
L
P
1
Points 737 [Total 9310]| Ratings 2| Comments 717| Invitations 0|Offline
S
Points 541 [Total 767]| Ratings 1| Comments 531| Invitations 0|Offline
S
Points 258 [Total 266]| Ratings 0| Comments 258| Invitations 0|Offline
S
Points 224 [Total 224]| Ratings 3| Comments 194| Invitations 0|Offline
S
Points 214 [Total 533]| Ratings 1| Comments 204| Invitations 0|Offline
S
Points 196 [Total 273]| Ratings 0| Comments 196| Invitations 0|Offline
S
Points 144 [Total 175]| Ratings 0| Comments 144| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2015 Purple Inc.