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erik [133]
3 years ago
12

A solution is made using 199.7 g of toluene and 80 g of benzene. What is the molality of the tolunene in the solution?

Chemistry
1 answer:
olga nikolaevna [1]3 years ago
6 0

Answer:

The molality of toluene is 7.748 molal

Explanation:

Step 1: Data given

Mass of toluene = 199.7 grams

Mass of benzene = 80.0 gram

Molar mass of benzene = 78.11 g/mol

Molar mass of toluene = 92.14 g/mol

Step 2: Calculate total mass

Total mass = mass of toluene + total benzene

Total mass = 199.7 grams + 80.0 grams

Total mass = 279.7 grams = 0.2797 kg

Step 3: Calculate moles of toluene

Moles toluene = mass toluene / molar mass toluene

Moles toluene = 199.7 grams / 92.14 g/mol

Moles toluene = 2.167 moles

Step 4: Calculate molality of toluene

Molality toluene = moles / mass solution

Molality = 2.167 moles / 0.2797 kg

Molality = 7.748 molal

The molality of toluene is 7.748 molal

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The layer of Earth that has partially melted material that moves the tectonic plates is Mantle.  The correct option is C.

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The Earth is divided into three layers: the crust, the mantle, and the core. This is the earth's outer layer, and it is composed primarily of solid rock, primarily basalt and granite. Oceanic crust and continental crust are the two types of crust.

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3 years ago
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