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Tems11 [23]
3 years ago
9

Calculate these volumes.

Chemistry
2 answers:
MrMuchimi3 years ago
7 0
Check photo for answers!

Westkost [7]3 years ago
3 0

<u>Answer:</u>

<u>For a:</u> The volume of graphite is 5.02cm^3

<u>For b:</u> The volume of bromine is 13.54cm^3

<u>Explanation:</u>

To calculate volume of a substance, we use the equation:

\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}      ......(1)

  • <u>For a:</u>

Density of graphite = 2.25g/cm^3

Mass of graphite = 11.3 g

Putting values in equation 1, we get:

2.25g/cm^3=\frac{11.3g}{\text{Volume of graphite}}\\\\\text{Volume of graphite}=\frac{11.3g}{2.25g/cm^3}=5.02cm^3

Hence, the volume of graphite is 5.02cm^3

  • <u>For b:</u>

Density of bromine = 2.928g/cm^3

Mass of bromine = 39.657 g

Putting values in equation 1, we get:

2.928g/cm^3=\frac{39.657g}{\text{Volume of bromine}}\\\\\text{Volume of bromine}=\frac{39.657g}{2.928g/cm^3}=13.54cm^3

Hence, the volume of bromine is 13.54cm^3

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Answer:

The answer to your question is pH = 2.2

Explanation:

Data

pH = ?

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Process

1.- Calculate the Molar concentration of HCl

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Molarity = 0.927 / 150

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Substitution

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Result

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Divide both side by 6.63×10¯³⁴

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Next, we shall determine the wavelength of the photon. This can be obtained as follow:

Frequency (f) = 6.17×10¹⁴ Hz

Velocity of photon (v) = 3×10⁸ m/s

Wavelength (λ) =?

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1 m = 1×10⁹ nm

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