Notice: Payments for answers will end 4/10/2017. Click for more info.
You have new items in your feed. Click to view.
Question and answer
Q: 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
A: 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.
26,806,609 questions answered
Popular Conversations
What does throttle mean?
4/16/2018 10:25:30 AM| 5 Answers
Error 401- Unauthorized
4/13/2018 4:59:54 AM| 3 Answers
The science of the creation of maps and charts is called ...
Weegy: The science of the creation of maps and charts is called cartography. User: Which of the following would ...
4/13/2018 8:36:16 AM| 3 Answers
What’s 307,495 rounded to the nearest thousand
Weegy: 307,495 rounded to the nearest thousand is 307,000. User: Which of the following statements about the number ...
4/20/2018 6:40:52 PM| 2 Answers
What's one way we can check our answer to 2 ×10 = 20? A. 2 ÷ ...
Weegy: A throttle body is part of the air intake system that helps control the amount of air that gets into the engine. ...
4/13/2018 7:46:31 AM| 2 Answers
Which sentence does not contain misplaced or dangling modifiers? ...
Weegy: The sentence that does not contain misplaced or dangling modifier is:
4/15/2018 8:58:11 PM| 2 Answers
Weegy Stuff
S
R
L
R
Points 160 [Total 298] Ratings 0 Comments 20 Invitations 14 Offline
S
1
L
L
P
R
P
L
P
P
R
P
R
P
R
Points 153 [Total 12956] Ratings 0 Comments 143 Invitations 1 Online
S
P
L
P
P
P
P
Points 149 [Total 575] Ratings 0 Comments 149 Invitations 0 Offline
S
Points 50 [Total 50] Ratings 0 Comments 0 Invitations 5 Offline
S
Points 35 [Total 35] Ratings 0 Comments 25 Invitations 1 Offline
S
P
L
Points 35 [Total 126] Ratings 0 Comments 35 Invitations 0 Offline
S
Points 30 [Total 35] Ratings 3 Comments 0 Invitations 0 Offline
S
Points 11 [Total 11] Ratings 0 Comments 11 Invitations 0 Offline
S
Points 10 [Total 10] Ratings 1 Comments 0 Invitations 0 Offline
S
Points 4 [Total 4] Ratings 0 Comments 4 Invitations 0 Online
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.