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gulaghasi [49]
4 years ago
9

A compound has an empirical formula of C2H5. What is true about this empirical formula?

Chemistry
1 answer:
Anni [7]4 years ago
7 0

Answer:

B. It shows the ratio of elements in the compound.

Explanation:

Empirical formula tells about the ration of the elements found in the compound . The ratio are in complete number .

For example the molecular formula of glucose is C₆ H₁₂O₆

Its empirical formula = CH₂O

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Generally the ionization potential in a period increases, but there are some exceptions. The one which is not an exception is
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Which element is most plentiful in Earth's crust?
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Two systems with heat capacities 19.9 J mol-1 K-1 and 28.2 ] mol 1 K-1 respectively interact thermally and come to an equilibriu
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Answer : The initial temperature of system 2 is, 19.415^oC

Explanation :

In this problem we assumed that the total energy of the combined systems remains constant.

-q_1=q_2

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The mass remains same.

where,

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C_2 = heat capacity of system 2 = 28.2 J/mole.K

T_f = final temperature of system = 30^oC=273+30=303K

T_1 = initial temperature of system 1 = 45^oC=273+45=318K

T_2 = initial temperature of system 2 = ?

Now put all the given values in the above formula, we get

-19.9J/mole.K\times (303-318)K=28.2J/mole.K\times (303-T_2)K

T_2=292.415K

T_2=292.415-273=19.415^oC

Therefore, the initial temperature of system 2 is, 19.415^oC

8 0
4 years ago
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Answer:

1. The dye that absorbs at 530 nm

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The relationship between energy and wavelenght can be expressed by the formula E = hc/λ, this means that the <em>lower</em> the wavelenght, the <em>higher</em> the energy is. So the dye that absorbs at a lower wavelenght has a larger HOMO-LUMO gap.

7 0
3 years ago
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