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3 years ago

When sweat evaporates from your skin, the salts left behind on your skin represent a:

2 answers:

7 0

When sweat evaporates from your skin, the salts left behind on your skin represent a solute. Because a sweat is a solution and in the solution, the solute particles are the salt. The rest of the choices do not answer the question above.

liubo4ka [24]3 years ago

6 0

Answer:

The correct answer is option solute

Explanation:

Solution is formed when solute is dissolved in solvent. The amount of solute present in the solution remains lesser than that of the solvent.

Solution = Solvent + Solute

Human sweat itself is a solution in which water serves as solvent ans salt serves as solute.

So, when sweat evaporates from our skin, salt left behinds represents solute which is dissolved `in water.

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A chemist determined by measurements that 0.030 moles of barium participated in a chemical reaction. Calculate the mass of bariu

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Answer: 4.1 g of barium precipitated.

Explanation:

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3 years ago

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3 years ago

Read 2 more answers

A 1.450 g sample of an unknown organic compound , X, is dissolved in 15.0 g of toluene

muminat

Answer:

Molecular weight of the compound = 372.13 g/mol

Explanation:

Depression in freezing point is related with molality of the solution as:

$\Delta T_f = K_f \times m$

Where,

$\Delta T_f$ = Depression in freezing point

$K_f$ = Molal depression constant

m = Molality

$\Delta T_f = K_f \times m$

$1.33 = 5.12 \times m$

m = 0.26

Molality = $\frac{Moles\ of\ solute}{Mass\ of\ solvent\ in\ kg}$

Mass of solvent (toluene) = 15.0 g = 0.015 kg

$0.26 = \frac{Mole\ of\ compound}{0.015}$

Moles of compound = 0.015 × 0.26 = 0.00389 mol

$Mol = \frac{Mass\ in\ g}{Molecular\ weight}$

Mass of the compound = 1.450 g

$Molecular\ weight = \frac{Mass\ in\ g}{Moles}$

Molecular weight = $\frac{1.450}{0.00389} = 372.13\ g/mol$

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3 years ago