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What mass of solid that has a molar mass of 89.0 g/mol should be added to 100.0 g of benzene to raise the boiling point of benzene by 2.42°C? (The boiling point elevation constant of benzene is 2.53°C•kg/mol.)
Use the equation attached.

2.84 g
8.52 g
21.5 g
93.0 g

What mass of solid that has a molar mass of 890 gmol should be added to 1000 g of benzene to raise the boiling point of benzene by 242C The boiling point elevat class=

Respuesta :

The required mass of the solid is 8.52g. Hence option B is correct.

We have,
mb = mass/89.0, ΔTb = 2.42° C and Kb = 2.53°C•kg/mol.

What is mass?

Mass of the object is defined as the space occupied by an object.

Given equation, ΔTb=Kb x mb
2.42 = 2.53 x mb
mb =0.95
mass / 89.0 x 0.1 = 0.95
mass = 8.52 g

Thus, the required mass of the solid is 8.52g.

learn more about mass here:
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