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ira [324]
3 years ago
12

Which body systems help to exchange oxygen and carbon dioxide?

Chemistry
1 answer:
Temka [501]3 years ago
3 0
I believe it is A. Respiratory and digestive bcs it moves 2 gases which is oxygen and carbon dioxide and why digestive is bcs gas exchange so I figured it’s digestive bcs circulatory is a organ that permits blood
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1. Balance this reaction: Fe2O3(s) + C(s) → Fe(s) + CO2(g)
MA_775_DIABLO [31]
<span>2Fe2O3(s) + 3C(s) →4 Fe(s) + 3CO2(g)
                       3 mol                      3mol
                       4 mol                      x mol
x=4*3/3= 4.0 mol

</span>2Fe2O3(s) + 3C(s) →4 Fe(s) + 3CO2(g)<span>
2 mol              3 mol
14 mol            x mol

x=14*3/2= 21.0 mol</span>
4 0
3 years ago
According to Newton’s second law of motion, when an object is acted on by an unbalanced force, how will that object respond? It
otez555 [7]

Answer:

C) It will accelerate.  

Explanation:

According to Newton’s second law of motion, when an object is acted on by an unbalanced force, it will accelerate.

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A) is wrong. The object will stop moving only if there is a balanced force in the opposite direction.

B) is wrong. The object will decrease speed only if the unbalanced force has a component opposite to the direction of motion.

d) is wrong. The object will increase speed only if the unbalanced force has a component in the direction of motion.

7 0
3 years ago
If 7.0 mol sample of a gas has a volume of 12.2 L, what would the volume be if the amount of gas was increased to 16.8 mol
Leviafan [203]

Answer:

V_{2} = 29.28\,L

Explanation:

Let assume that gas behaves ideally and experiments an isobaric and isothermal processes. The following relationship is applied to determined the final volume:

\frac{V_{1}}{n_{1}} = \frac{V_{2}}{n_{2}}

V_{2} = V_{1} \cdot \left(\frac{n_{2}}{n_{1}} \right)

V_{2} = (12.2\,L)\cdot \left(\frac{16.8\,moles}{7\,moles} \right)

V_{2} = 29.28\,L

5 0
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Verdich [7]

Answer:

The Lewis dot diagram is supposed to have dots on each side. What's incorrect is that there isn't a dot on the bottom, only the left and right side and the top. What's correct about this is that there are 5 outer valence electrons, and they correctly put 5 dots, even though they're in the wrong place.

Explanation:

4 0
3 years ago
Is petrol a conductor or an insulator
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Petrol is a conductor of electricity, because it conducts rather than insulates. 
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3 years ago
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