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Ket [755]
3 years ago
13

Paul has an 50​% methyl alcohol solution. He wishes to make a gallon of a solution by mixing his methyl alcohol solution with wa

ter. If 128 ​ounces, or a​ gallon, of solution should contain 5​% methyl​ alcohol, how much of the 50​% methyl alcohol solution and how much water must be​ mixed?
Chemistry
1 answer:
stira [4]3 years ago
7 0

Answer:

To make one gallon of 5% methyl alcohol we require 115.2oz of water and 12.8oz of 50% methyl alcohol solution

Explanation:

Required solution = 1 gallon of 5% methyl alcohol or1 gallon 5/100 moles per dm3 of methyl alcohol

Number of moles in required solution = 0.05moles/dm3 × 1gallon

Where 1 gallon = 0.00378dm3

= 0.05moles/dm3 × 0.00378dm3 = 1.892×10-4 moles

 

The quantity of the  50% solution with Paul required is given by

50% = 50/100 = 0.5 moles/dm3 

Volume of 50% solution of methyl alcohol that contains 1.892×10-4 moles

= concentration = (Number of moles)/(volume of dm3) of solution thus

Volume of solution = (Number of moles)/(concentration)

1.892/0.5 =3.785×10-4dm3 of the 50% solution is required to make 1 gallon of 5% solution

 

3.785×10-4dm3 = 12.8oz

Thus to make 1 gallon or 128oz solution of 5% alcohol requires

128oz - 12.8 oz = 115.2oz of water and 12.8oz of 50% methyl alcohol solution

 

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What is the amount of solute required if the solution is 50 ml and the solvent is 35 ml. Solve and explain
e-lub [12.9K]

Answer:

15 mL of the solute

Explanation:

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

Solution = 50 mL

Solvent = 35 mL

Solute =?

Solution is simply defined as:

Solution = solute + solvent

With the above formula, we can easily obtain the solute in the solution as follow:

Solution = 50 mL

Solvent = 35 mL

Solute =?

Solution = solute + solvent.

50 = solute + 35

Collect like terms

50 – 35 = solute

15 = solute

Solute = 15 mL

Therefore, 15 mL of the solute is required.

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3 years ago
Why is it dangerous to have electric appliances near you when you are taking a bath?
VashaNatasha [74]

Answer:

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3 years ago
Why a mixture of magnesium hydroxide and water is known as milk of magnesia
gregori [183]

because of its milk-like appearance. ... Since the dissociation of this small amount of dissolved magnesium hydroxide is complete, magnesium hydroxide is considered a strong electrolyte. Its low solubility makes it a weak base.

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3 years ago
Magnesium combines with oxygen to form magnesium oxide. If 10.57 g of
Phantasy [73]

The total mass is 10.57+6.96=17.53 g.

So, the percent by mass of magnesium is (10.57)/(17.53) * 100 = <u>60.3%</u>

<u />

The percent by mass of oxygen is (6.96)/(17.53) * 100 = <u>39.7%</u>

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2 years ago
g a package of aluminum foil contains 50 ft2 of foil, which weighs approximately 8.0 oz. aluminum has a density of 2.70 g/cm3. w
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Answer:

1.8×10^-2mm or 0.018mm

Explanation:

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But volume= area×thickness

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