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Crank
4 years ago
8

A 3 ml volume of a solution containing an unknown concentration of hcl is added to 7 ml of water. it is then determined that the

concentration of the hcl in the diluted solution is 630 mm. what was the concentration of hcl in the original solution?
Chemistry
1 answer:
Dennis_Churaev [7]4 years ago
6 0
It is b becuase all the other are wrong
You might be interested in
A gas has a pressure of 7.01 atm at 227°C. What will its temperature be if the pressure is increased to 12.1 atm and volume is h
kirill [66]

Answer:

The temperature of the gas will be 590.05 C.

Explanation:

Gay-Lussac's law can be expressed mathematically as follows:

\frac{P}{T} =k

Where P= Pressure, T = temperature, K = Constant

This law indicates that the ratio between pressure and temperature is constant.

This law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of shocks against the walls increases, that is, the pressure increases. That is, the gas pressure is directly proportional to its temperature.

In short, when there is a constant volume, as the temperature increases, the gas pressure increases. And when the temperature decreases, gas pressure decreases.

It is desired to study two different states, an initial state and an final state. You have a gas that is at a pressure P1 and at a temperature T1 at the beginning of the experiment. When the temperature varies to a new T2 value, then the pressure will change to P2, and the following will be true:

\frac{P1}{T1} =\frac{P2}{T2}

In this case:

  • P1= 7.01 atm
  • T1= 227 C= 500 K (being 0 C= 273 K)
  • P2= 12.1 atm
  • T2= ?

Replacing:

\frac{7.01 atm}{500 K} =\frac{12.1 atm}{T2}

Solving:

T2=12.1 atm*\frac{500 K}{7.01 atm}

T2= 863.05 K= 590.05 C

<u><em>The temperature of the gas will be 590.05 C.</em></u>

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

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

6 0
3 years ago
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb of energy
Ivenika [448]

Answer:

See explanation below

Explanation:

First, you are not providing any data to solve this, so I'm gonna use some that i made up to explain to you, how to solve it. Then, you can go and replace the data you have with the procedure here

The concentration of liquid sodium will be aroun 8.5 MJ of energy, and I will assume that the temperature will not be increased more than 15 °C.

The expression to calculate the amount of energy is:

Q = m * cp * dT

Where:

m: moles needed

cp: specific heat of the substance.

The cp of liquid sodium reported is 30.8 J/ K mole

Replacing all the data in the above formula, and solving for m we have:

m = Q / cp * dT

dT is the increase of temperature. so 15 ° C is the same change for 15 K.

We also need to know that 1 MJ is 1x10^6 J, so replacing all data:

m = 8.5 * 1x10^6 J / 30.8 J/K mole * 15

m = 18,398.27 moles

The molar mass of sodium is 22.95 g/mol so the mass is:

mass = 18,398.27 * 22.95 = 422,240.26 g or simply 422 kg rounded.

7 0
3 years ago
4. the answer is not D , please answer
Kisachek [45]

Answer:

i think c??

Explanation:

hope it correct

5 0
3 years ago
Read 2 more answers
A gas has a volume of 5.00 L at 20 degrees Celsius. What is the volume of gas at 150 degrees Celsius.
WARRIOR [948]

Answer:

7.22 L

Explanation:

From the question,

Applying Charles law,

V₁/T₁ = V₂/T₂...................... Equation 1

Where V₁ = Initial volume of gas, V₂ = Final volume of gas, T₁ = Initial Temperature of gas in Kelvin, T₂ = Final Temperature of gas in Kelvin

Make V₂ the subject of the equation

V₂ = (V₁×T₂)/T₁................. Equation 2

Given: V₁ = 5.00 L, T₁ = 20 °C = (20+273) K = 293 K, T₂ = 150 °C = (150+273) K = 423 K

Substitute these value into equation 2

V₂ = (5.00×423)/293

V₂ = 7.22 L

5 0
3 years ago
How does the ocean floor keep track of magnetic fields
fgiga [73]
I believe the answer is D.
6 0
3 years ago
Read 2 more answers
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