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alexdok [17]
1 year ago
12

In the laboratory, a student adds 55.7 mL of water to 17.6 mL of a 0.718 M hydrobromic acid solution. What is the concentration

of the diluted solution
Chemistry
1 answer:
andreev551 [17]1 year ago
3 0

Answer: The concentration of the diluted solution is 0.17M.

Explanation:

The equation for diluted solutions is shown as: M_{s} V_{s} =M_{d} V_{d}.

~M= Molarity (labeled as M)

~V=Volume (in L)

~s= stock solution (what you started with)

~d= diluted solution (what you finish with)

Now that we have that down, let's plug in our data!

0.718M*17.6mL=M_{d} *73.3mL

(I put V_{d} as 73.3 because you are adding 55.7mL to 17.6mL, meaning that you have to add that to get V_{d}. In other words, 17.6mL+55.7mL=73.3mL)

There is a little problem here though. The volume is not in liters. But no worries, we can just convert it by dividing it by 1000.

17.6mL/1000=0.0176L     73.3mL/1000=0.0733L

Now that we have both volumes in liters, we can plug them in correctly.

0.178M*0.0176L=M_{d} *0.0733L

M_{d} =\frac{0.718M*0.0176L}{0.0733L}     M_{d} =0.17M

With all of this shown, we now know that the concentration of the diluted solution is 0.17M.

I hope this helps! Pls mark brainliest!! :)

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0.645 L

Explanation:

To find the volume, you need to (1) convert grams to moles (using the molar mass) and then (2) calculate the volume (using the molarity ratio). The final answer should have 3 sig figs to match the sig figs of the given values.

(Step 1)

Molar Mass (KOH): 39.098 g/mol + 15.998 g/mol + 1.008 g/mol

Molar Mass (KOH): 56.104 g/mol

19.9 grams KOH              1 mole
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(Step 2)

Molarity = moles / volume                            <----- Molarity ratio

0.550 M = 0.355 moles / volume                 <----- Insert values

(0.550 M) x volume = 0.355 moles              <----- Multiply both sides by volume

volume = 0.645 L                                          <----- Divide both sides by 0.550

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1. The most useful ore of aluminum is bauxite, in which Al is present as hydrated oxides, Al2O3⋅xH2O The number of kilowatt-hour
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Option A: 59.6

Explanation:

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Mass of aluminium = 4.00 kg

The applied emf = 5.00 V

watts = volts * amperes

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equivalent mass of aluminum = 27 / 3 = 9  

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amperes * seconds = 42888888.9

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Step 3: Calculate kilowatts

watts = 5 * 11913.6 / hours

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kilowatts = 59.6 (per hour)

The number of kilowatt-hours of electricity required to produce 4.00kg of aluminum from electrolysis of compounds from bauxite is 59.6 kWh when the applied emf is 5.00V

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The functions of the ears are:

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<h3>What is the function of the ear?</h3>

The ear is one of the five sense organs in the body.

The sense organs are the organs which receive external stimulus and send it to the brain for processing and response.

The other sense organs are:

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In conclusion, the sense organs function to receive stimulus and send them to the brain.

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