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ElenaW [278]
3 years ago
9

What would be the formula for an alkane which contains 30 hydrogen atoms? C__H30 16 18 14 15

Chemistry
2 answers:
Sladkaya [172]3 years ago
6 0
The formula would be C14H30.
kirill115 [55]3 years ago
4 0

Answer: Option (c) is the correct answer.

Explanation:

A hydrocarbon that contains only carbon and hydrogen atoms attached through single bonds is known as an alkane.

General formula for alkanes is C_{n}H_{2n+2} where n is any integer.

For example, a hydrocarbon with 30 hydrogen atoms will have the value of "n" as follows.

                        Total hydrogen atoms = 2n + 2

                                         30 = 2n + 2

                                   30 - 2 = 2n

                                            n = 14

Therefore, number of carbon atoms in this hydrocarbon will be 14.

Hence, we can conclude that formula for an alkane which contains 30 hydrogen atoms is C_{14}H_{30}.

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An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is​
Nimfa-mama [501]

The focal length of the mirror is 15 cm

From the question given above, the following data were obtained:

Object distance (u) = 30 cm

Image distance (v) = 30 cm

<h3>Focal length (f) =? </h3>

The focal length of the mirror can be obtained as follow:

\frac{1}{f} = \frac{1}{v} + \frac{1}{u} \\\\\frac{1}{f} = \frac{1}{30} + \frac{1}{30}\\\\\frac{1}{f} = \frac{2}{30} \\\\\frac{1}{f} = \frac{1}{15} \\\\

<h3>Invert </h3><h3>f = 15 cm</h3>

Therefore, the focal length of the mirror is 15 cm

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3 0
3 years ago
Phosphorous trichloride (PCl3) is produced
vladimir1956 [14]

The percentage yield obtained from the given reaction above is 74.8%

<h3>Balanced equation </h3>

P₄ + 6Cl₂ → 4PCl₃

Molar mass of P₄ = 31 × 4 = 124 g/mol

Mass of P₄ from the balanced equation = 1 × 124 = 124 g

Molar mass of PCl₃ = 31 + (35.5×3) = 137.5 g/mol

Mass of PCl₃ from the balanced equation = 4 × 137.5 = 550 g

<h3>SUMMARY</h3>

From the balanced equation above,

124 g of P₄ reacted to produce 550 g of PCl₃

<h3>How to determine the theoretical yield </h3>

From the balanced equation above,

124 g of P₄ reacted to produce 550 g of PCl₃

Therefore,

79.12 g of P₄ will react to produce = (79.12  × 550) / 124 = 350.9 g of PCl₃

<h3>How to determine the percentage yield </h3>
  • Actual yield of PCl₃ = 262.6 g
  • Theoretical yield of PCl₃ = 350.9 g
  • Percentage yield =?

Percentage yield = (Actual /Theoretical) × 100

Percentage yield = (262.6 / 350.9) × 100

Percentage yield = 74.8%

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brainly.com/question/14735801

4 0
2 years ago
In an electron dot diagram of propane (C3H8), how many double bonds are present?
NeX [460]

Answer:- none

Explanations:- For naming hydrocarbons we use the suffix -ane, -ene and -yne.

-ane is used when we have only single bonds between all carbons. -ene is used if there is any double bond between two carbons and the -yne is used if there is any triple bond between two carbons.

The given name of the compound is propane. It ends at -ane and so it's an alkane and must have single bonds between all the carbons it has. So, there are zero double bonds present in C_3H_8 .

This is also clear from the below lewis dot structure of the compound.


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