Question and answer
Question not found
Ask a question
Not a good answer? Get an answer now. (Free)
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
Methane, CH4, burns in oxygen gas to form water and carbon dioxide. What is the correct balanced chemical equation for this reaction? A. CH4 + O ? H2O + CO2 B. CH4 + 4O ? 2H2O + CO2 C. CH4 + O2 ? H2O + CO2 D. CH4 + 2O2 ? 2H2O + CO2
Weegy: D. CH4 + 2O2 ? 2H2O + CO2 User: How many atoms are present in 3 moles of chromium? A. 6.02 x 1023 atoms B. 1.80 x 1023 atoms C. 1.80 x 1024 atoms D. 52.0 atoms Weegy: C. 1.80 x 1024 atoms User: How many grams of CO2 are in 2.1 mol of the compound? A. 21.0 g B. 44.0 g C. 66.0 g D. 92.4 g Weegy: 1 mole CO2 = 44.0096 grams CO2 (molar mass of CO2) Therefore, 2.1 mol CO2 x (44.0096 grams CO2/1 mole CO2) = 92.4 grams CO2 - > D User: An industrial process makes calcium oxide by decomposing calcium carbonate. Which of the following is NOT needed to calculate the mass of calcium oxide that can be produced from 4.7 kg of calcium carbonate? A. the balanced chemical equation B. molar masses of the reactants C. molar masses of the product D. the volume of the unknown mass Weegy: D. the volume of the unknown mass User: The coefficients in a balanced chemical equation always can express the ratio of A. moles of reactants and products. B. volume of reactants and products. C. atoms of reactants and products. D. mass of reactants and products. Weegy: The answer is A. moles of reactants and products. 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 User: Which of the following is NOT always true about a synthesis reaction? A. One product is formed. B. There is only one reactant. C. The general formula is A + B ? C. D. A reactant might be a compound, or it might be an element. Weegy: B. There is only one reactant. User: In a chemical reaction, an iron atom became the ion Fe2+. What happened to the iron atom? A. It lost ... (More)
Question
Expert Answered
Asked 7/2/2012 12:22:13 PM
0 Answers/Comments
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 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 ] (More)
Question
Expert Answered
Asked 7/2/2012 12:53:37 PM
0 Answers/Comments
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
17,894,081 questions answered
Popular Conversations
3x+3/18x= User: 10x+3/=
Weegy: this is quite simple, if you read over the question a few times and learn the tendencies. One number is ten ...
10/20/2014 5:27:08 PM| 5 Answers
Which value for x makes the sentence true? 8x = 3x 30
Weegy: 8x - 20 = 3x + 5; 8x - 3x = 5 + 20; 5x = 25; x = 25/5; x = 5 User: 7x - 5 = 3x + 11 Weegy: 8x + 3 = 7x - ...
10/20/2014 7:11:38 AM| 2 Answers
Which value for x makes the sentence true? 8x = 3x + 20
Weegy: 8x - 20 = 3x + 5; 8x - 3x = 5 + 20; 5x = 25; x = 25/5; x = 5 User: Which value of x makes the following ...
10/20/2014 7:16:30 AM| 2 Answers
Which value of x makes the following equation true? 3(x - 3) = -2x ...
Weegy: 6(x - 2) = -2x + 28 6x - 2 = -2x + 28 6x - 12 = 28 + 2x 8x - 12 = 28 8x = 28 + 12 8x = 40 x = 40/8 x = ...
10/20/2014 7:18:42 AM| 2 Answers
After the auditorium filled up,we seated about fifty people on the ...
Weegy: After the auditorium filled up, we seated about fifty people on the stage. The sentence structure is: ...
10/20/2014 9:35:49 AM| 2 Answers
When particles are moving between two phases and no net change in the ...
Weegy: When particles are moving between two phases and no net change in the amount of either phase occurs, ...
10/20/2014 10:33:23 AM| 2 Answers
Is the example a complete sentence, sentence fragment, or run-on ...
Weegy: The bird dove swiftly then it landed gently on the branch. This is B. Complete sentence. User: Is the example ...
10/20/2014 10:38:45 AM| 2 Answers
Weegy Stuff
S
L
1
1
1
1
L
1
L
Points 2160 [Total 14535]| Ratings 0| Comments 2160| Invitations 0|Offline
S
L
1
L
P
C
1
P
C
1
L
Points 1393 [Total 10874]| Ratings 3| Comments 1363| Invitations 0|Offline
S
1
L
1
L
P
P
L
Points 746 [Total 12975]| Ratings 0| Comments 746| Invitations 0|Offline
S
L
Points 459 [Total 1858]| Ratings 0| Comments 459| Invitations 0|Offline
S
1
L
L
Points 452 [Total 6246]| Ratings 3| Comments 422| Invitations 0|Offline
S
Points 401 [Total 401]| Ratings 0| Comments 371| Invitations 3|Offline
S
Points 303 [Total 304]| Ratings 3| Comments 273| Invitations 0|Offline
S
Points 195 [Total 195]| Ratings 1| Comments 185| Invitations 0|Offline
S
P
C
L
P
L
1
Points 48 [Total 6282]| Ratings 0| Comments 48| Invitations 0|Offline
S
Points 27 [Total 27]| Ratings 0| Comments 27| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.