1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
FromTheMoon [43]
3 years ago
12

5. The combustion of coal with oxygen forms CO2 and releases 94 kcal of energy.

Chemistry
1 answer:
Sonbull [250]3 years ago
8 0
Ok buddy sorry buddy I just got
You might be interested in
Question 2(Multiple Choice Worth 4 points) (01.01 MC) Dominic and Eva are using the same type of stopwatches to measure the time
LekaFEV [45]
The results of Dominic and Eva's experiment is unreliable and can lead to a pseudoscientific claim primarily because they did not repeat their tests multiple times. Although, they used the same type of stopwatch in recording the time it takes for the chemical reaction to occur, they have different reactions times. Thus, it would have been better if they conducted several trials then obtained the average of their results.    
6 0
3 years ago
Read 2 more answers
What type of reaction is shown below? <br>a) Addition reaction <br>b) Esterification​
Gemiola [76]

Answer:

a) Addition reaction, is your answer

6 0
2 years ago
Compare 1 mole of H2, 1 mole of O2, and 1 mole of F2. (a) Which has the largest number of molecules? Explain why. (b) Which has
AURORKA [14]

<u>a) Answer: </u>

<em>Number of molecules in 1 mole</em>

<u>Explanation:</u>

a) Whether we take any of the substance among all three of the given substances they will have the same number of molecules in 1 mole of the substance is considered and the value for this will be 6.023 x 10^23

<u>b)  Answer: </u>

<em>In the given question </em><em>mass of the substance</em><em> which is </em><em>greatest</em><em> is asked for </em><em>one mole</em><em> and we also know that </em><em>mass of one mole is given by molar mass.  </em>

<u>Explanation:</u>

b) It is known that 31.98g/mol is the molar mass for oxygen which is greater than that of hydrogen while fluorine has a molar mass of 38.0 g/mol which on comparison shows that, it is the highest amongst all three.

3 0
3 years ago
If calcium has two valence electrons and sulfur has six, how many calcium atoms are needed to form an ionic bond with sulfur?
Kipish [7]
3 calcium atoms would be needed.
3 0
2 years ago
Read 2 more answers
Need help asap 20 points
Norma-Jean [14]
The answer to the problem is A because the velocity of the plane changes when she turns it
4 0
3 years ago
Read 2 more answers
Other questions:
  • How is the periodic table structured with regard to elements with similar properties ?
    13·2 answers
  • What is the purpose of the technology design process?
    6·1 answer
  • You and a friend both roll a die at the same time. On the first roll, the dots on the two dice add up to 7. The second roll, the
    8·1 answer
  • ball has a volume of 5.27 liters and is at a temperature of 27.0°C. A pressure gauge attached to the ball reads 0.25 atmosphere.
    13·1 answer
  • A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is
    12·1 answer
  • Wich of these equations are balanced? a) H2SO4+2AL---&gt;AL2(SO4) b)2KCL+Pb(NO3)2---&gt;2KNO3+PbCL2
    10·1 answer
  • What is the purpose of light energy?
    15·1 answer
  • What can help overcome a positive enthalpy of solution and allow a solid
    9·1 answer
  • Does a fish's scales shred as the fish grows larger
    7·1 answer
  • What happens when potassium metal react with nitric acid
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!