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Alex73 [517]
2 years ago
9

Someone help this is physical science 8th grade

Chemistry
1 answer:
photoshop1234 [79]2 years ago
5 0
This is because the red filter only allows red light through. The other colours(wavelengths) of the spectrum are absorbed. Similarly, a green filter only allows green light through.
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What is the enthalpy of combustion (per mole) of C4H10 (g)? 
Artemon [7]
The balanced chemical reaction for the complete combustion of C4H10 is shown below:

                    C4H10 + (3/2)O2 --> 4CO2 + 5H2O

The enthalpy of formation are listed below:
          C4H10: -2876.9 kJ/mol
              O2:   none (because it is pure substance)
             CO2: -393.5 kJ/mol
             H2O: -285.8 kJ/mol

The enthalpy of combustion is computed by subtracting the total enthalpy formation of the reactants from that of the products.

               ΔHc = (4)(-393.5 kJ/mol) + (5)(-285.8 kJ/mol) - (-2876.9 kJ/mol)
                       = -<em>126.1 kJ</em>

Thus, the enthalpy of combustion of the carbon is -126.1 kJ. 
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3 years ago
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when carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 14.4g of carbon were burned in the presence of
SpyIntel [72]
Answer: C(s) + O2(g) --> CO2(g)12g (C) .... 50.8g (O2)................. initial amounts0g(C) .........18.8g(O2) ................. amounts when reaction completeThat means that C was the limiting reactant, and the amount of CO2 is based on the amount of carbon that burned. Covert 12 grams of carbon to moles. The moles of CO2 will be the same, since they are in a 1:1 mole ratio. Then convert the moles of CO2 to grams.12g C x (1 mol C / 12.0 g C) x (1 mol CO2 / 1 mol C) x (44.0g CO2 / 1 mol CO2) =44 g of CO2
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What is the oxidation state of an individual phosphorus atom in P O 3 3−?
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-3 - 3(-2) = +3
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Drag each label to the correct location on the equation. Each label may be used more than once.
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HCl is an acid, C5H5N is a base, Cl is an acid, and HC5H5N is an acid.

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Throwing a snowball during snowball fight is most like an example of
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Ittttt’ssss erosion.
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