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oksano4ka [1.4K]
4 years ago
14

The compounds C2H4 and C4H8 have the same

Chemistry
2 answers:
Wewaii [24]4 years ago
4 0

Answer : Option D) Same empirical formula.


Explanation : In the given molecules of C_{2} H_{4} and C_{4} H_{8} the ratio of C : H atoms in the molecule remains the same i.e 1 : 2.


It means they are in same proportions in both the molecules. Hence, it can be called as the molecules with the same empirical formula. Where empirical formula means the proportions of the elements present in a particular compound are same but differ in arrangement of atoms.

ArbitrLikvidat [17]4 years ago
3 0
The compounds C2H4 and C4H8 have the same empirical formula.
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Determine the percent ionization of a 0.140 m hcn solution.
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                       HCN  ⇄     H⁺     +     CN⁻
Initial              0.14            0                0
Change            -x             +x             +x
Equilibrium    (0.14 -x)     +x             +x
Ka = \frac{[CN^{-}][ H^{+} ]}{[HCN]}
6.2 x 10⁻¹⁰ = \frac{(x)(x)}{(0.14 - x)}
value of x <<<< 0.14
so x² = (6.2 x 10⁻¹⁰) (0.14)
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% ionization = Hydrogen ion concentration / total concentration x 100 
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118.5 g piece of lead is heated with 4,700 J of energy. If the specific heat of lead is 0.129 J/ (g ⋅ °C), and the lead’s initia
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Answer:

317.46 °C

Explanation:

The expression for the calculation of heat is shown below as:-

Q=m\times C\times \Delta T

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C is the specific heat capacity

\Delta T  is the temperature change

Thus, given that:-

Mass of lead = 118.5 g

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\Delta T=(x-10)\ ^0C

Q = 4700 J

So,  

4700=118.5\times 0.129\times (x-10)

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x-10=307.46083

x=317.46

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