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Oduvanchick [21]
3 years ago
5

What is the function/job of the digestive system?

Chemistry
1 answer:
SIZIF [17.4K]3 years ago
6 0

Answer:

The answer is B (to transport nutrients and waste throughout the body)

Explanation:

Took the test

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How much energy is released when 0.40 mol C6H6(g) completely reacts with oxygen?
Vsevolod [243]
 <span>This question asksyou to apply Hess's law. 
You have to look for how to add up all the reaction so that you get the net equation as the combustion for benzene. The net reaction should look something like C6H6(l)+ O2 (g)-->CO2(g) +H2O(l). So, you need to add up the reaction in a way so that you can cancel H2 and C. 
multiply 2 H2(g) + O2 (g) --> 2H2O(l) delta H= -572 kJ by 3 
multiply C(s) + O2(g) --> CO2(g) delta H= -394 kJ by 12 
multiply 6C(s) + 3 H2(g) --> C6H6(l) delta H= +49 kJ by 2 after reversing the equation. 
Then, 
6 H2(g) + 3O2 (g) --> 6H2O(l) delta H= -1716 kJ 
12C(s) + 12O2(g) --> 12CO2(g) delta H= -4728 kJ 
2C6H6(l) --> 12 C(s) + 6 H2(g) delta H= - 98 kJ 
______________________________________... 
2C6H6(l) + 16O2 (g)-->12CO2(g) + 6H2O(l) delta H= - 6542 kJ 
I hope this helps and my answer is right.</span>
4 0
3 years ago
Read 2 more answers
Where does the energy come from to break the bonds of water and carbon dioxide molecules?​
Marianna [84]

Answer: The energy from sunlight drives the reaction of carbon dioxide and water molecules to produce sugar and oxygen, as seen in the chemical equation for photosynthesis.

Explanation:

5 0
3 years ago
Question (ii) answer
katrin [286]
The student stirs it because he wants the reaction to take place more quickly.
4 0
3 years ago
Convert the following numbers of calories or
nignag [31]

Answer:

a 32823.48joules

b  1979.8688 joules

c. 1979.8688

Explanation:

4 0
3 years ago
Which part of a light microscope focuses light onto the specimen through the lens?
finlep [7]
I think its the mirror because condenser helps in allowing the amount of light to pass.
5 0
4 years ago
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