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nirvana33 [79]
3 years ago
8

a solution must be at a higher temperature than a pure solvent to boil. what colligative property can be employed to achieve thi

s?
Chemistry
2 answers:
Kazeer [188]3 years ago
6 0

Boiling-point elavation.

zimovet [89]3 years ago
5 0

Answer : The colligative property employed to achieve this can be, Elevation in boiling point.

Explanation :

Elevation in boiling point : It is defined as the temperature or boiling point of a liquid (a solvent) will be higher when the another compound is added. This means that a solution must be at a higher temperature or boiling point than a pure solvent.

For example : When a non-volatile solute (a salt) is added to a pure solvent such as water.

The formula for elevation in boiling point will be,

\Delta T_b=k_b\times m

or,

T_b-T^o_b=\frac{1000\times k_b\times w_2}{w_1\times M_2}

where,

T_b = boiling point of solution

T^o_b = boiling point of pure solvent

k_b = boiling point constant

m = molality

w_2 = mass of solute

w_1 = mass of solvent

M_2 = molar mass of solute

Hence, the colligative property employed to achieve this can be, Elevation in boiling point.

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A rectangular fence is 3 times as long as it is wide. The perimeter is 60ft. Find the dimensions of the fence
Mashutka [201]

Answer:

The length of the fence is 22.5ft and the width of the fence is 7.5ft.

Explanation:

To solve this problem we will turn this question into an equation.

The equation for the perimeter of a rectangle is 2l + 2w = perimeter.

In the question we were given the perimeter so we can go ahead and plug this in.

2l + 2w = 60

In the question we are also told that the fence is 3 times as long as it is wide. This means that 1l = 3w. We can now subsitute l for 3w so that we only have one variable.

2(3w) + 2w = 60

Now we can simply use algebra to solve for w.

6w + 2w = 60

8w = 60

w = 7.5

Now that we know the value of w we can find the value of l since we know 1l = 3w.

l = 3w

l = 3(7.5)

l = 22.5

The length of the fence is 22.5ft and the width of the fence is 7.5ft.

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How many carbon atoms would be in the compound named chlorobenzene
kondaur [170]

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How many grams of HCl(aq) are required to react completely with 1.25g of Zn(s) to form ZnCl2(aq) and H2
faltersainse [42]

1.39 g HCl

Explanation:

The balanced chemical equation for this reaction is given by

Zn(<em>s</em>) + 2HCl(<em>aq</em>) ---> ZnCl2(<em>aq</em>) + H2(<em>g</em>)

Convert the # of grams of Zn to moles:

1.25 g Zn × (1 mol Zn/65.38 g Zn) = 0.0191 mol Zn

Use the molar ratio to find the # of moles of HCl needed to react completely with the given amount of Zn:

0.0191 mol Zn × (2 mol HCl/1 mol Zn) = 0.0382 mol HCl

Convert this amount to grams:

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