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3 years ago

Compound X has a molar mass of 416.48 g mol

Chemistry

1 answer:

bazaltina [42]3 years ago

4 0

Answer:

P₂Cl₁₀

Explanation:

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

Molar mass of compound X = 416.48 g/mol

Percentage of phosphorus (P) = 14.87%

Percentage of Chlorine (Cl) = 85.13%

Molecular formula of X =?

Next, we shall determine the empirical formula of compound X. This can be obtained as follow:

P = 14.87%

Cl = 85.13%

Divide by their molar mass

P = 14.87 / 31 = 0.480

Cl = 85.13 / 35.5 = 2.398

Divide by the smallest

P = 0.480 / 0.480 = 1

Cl = 2.398 / 0.480 = 5

Empirical formula of compound X is PCl₅

Finally, we shall determine the molecular formula of compound X. This can be obtained as follow:

Molar mass of compound X = 416.48 g/mol

Empirical formula = PCl₅

Molecular formula =?

Molecular formula= [Empirical formula]ₙ

[PCl₅]ₙ = 416.48

[31 + (35.5 × 5)]ₙ = 416.48

[31 + 177.5]n = 416.48

208.5n = 416.48

Divide both side by 208.5

n = 416.48 / 208.5

n = 2

Molecular formula = [PCl₅]ₙ

Molecular formula = [PCl₅]₂

Molecular formula = P₂Cl₁₀

Therefore, the molecular formula of compound X is P₂Cl₁₀

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Protein 4 cal/g

Fat 9 cal/g

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$1=1,000cal/\text{nutritional calorie}$

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Carbohydrate 4,000 cal/g

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Fat 9,000 cal/g

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Protein 16,736 joule/g

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Now you can multiply the grams of each macronutrient in one potato by its energy content:

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Carbohydrate 16,736 joule/g × 37 g = 619,232 joules

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Total = 619,232 joules + 71,968.8 joules + 150,624 joules = 841,820.8 joules.

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