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KATRIN_1 [288]
2 years ago
13

To make a 3.50 M solution, how many moles of solute will be needed if 11 liters of solution are required?

Chemistry
2 answers:
never [62]2 years ago
5 0

Answer:

To make a 3.50 M solution, 38.5 moles of solute will be needed if 11 liters of solution are required.

Explanation:

Molarity is defined as a concentration unit that indicates the number of moles of solute per liter of solution. That is, it indicates the number of moles of solute that are dissolved in a given volume. Then, the molarity is calculated by dividing the moles of the solute by the liters (volume) of the solution:

Molarity( M)=\frac{number of moles of solute}{volume}

Molarity is expressed in units (\frac{moles}{liter}).

So, knowing the definition of molarity, you can apply a rule of three as follows: if by the definition of molarity in 1 L of solution there are 3.5 moles of solute, in 11 L of solution how many moles of solute are there?

moles=\frac{11 L*3.5 moles}{1L}

moles=38.5

<u><em>To make a 3.50 M solution, 38.5 moles of solute will be needed if 11 liters of solution are required.</em></u>

<u><em></em></u>

hodyreva [135]2 years ago
3 0

Answer:

The number of moles is 38.5 moles

Explanation:

Given:

Concentration of the solution = 3.5 M

Volume of solution = 11 L

Question: How many moles of solute, nsol = ?

The molarity is the number of moles of the solute divided by the volume of the solution, in this case:

n_{sol} =Molarity*Volume=3.5\frac{mol}{L} *11L=38.5moles

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2 years ago
!!MARKING BRAINLIEST!! Please help this is due at midnight!! No websites please just help me! :(
9966 [12]

Answer:

I'll do the first one for you. The reason why I'm not going to do the rest is because this is pretty simple stuff. I'll explain how I got the answer, please read it ^^ the rest of the problems should be a breeze.

1. 5.454285714285714 liters, or approx. 5.45 liters

Explanation:

P1V2 = P2V2

P1 refers to the original pressure. V1 refers to the original volume, or the amount of space the gas takes up.

P2 and V2 refer to the final pressure or volume, accordingly.

You insert the values into the equation, like so:

(8.3)(46) = (70)(x)

Now, multiply.

381.8 = 70x

Use inverse operations to find the value of x. Divide 381.8 by 70 to isolate x.

381.8/70 = x

5.454285714285714 = x

The volume of the gas when the pressure is increased to 70.0 mm Hg is approximately 5.45 liters. Don't forget about the units at the end, when you write your final answer.

Important! When pressure <em>increases</em>, volume <em>decreases, </em>and vice versa. Volume and pressure for gases are <em>inversely proportional. </em>So even though the pressure increased, that doesn't mean the volume increases, too.

<em>You can check your answers easily!</em>

Just multiply your final answer by its corresponding pressure or volume and compare it to the other. I hope that made sense. Like so:

5.454285714285714 x 70 = 381.8

8.3 x 46 = 381.8

That makes P1V2 DOES equal P2V2, and your answer is correct.

I hope this helped in time for you to submit it before the deadline! Good luck.

<em>Tips! </em>

For #2: I'm pretty sure the mentioning of the temperature (25.0 °C) doesn't matter. You can ignore it, it won't affect your calculations.

For #4: the standard pressure in mm Hg (millimeters of mercury) is 760 mm Hg. That's your P2.

6 0
3 years ago
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