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Mila [183]
3 years ago
13

Choose EXACTLY TWO answers that are correct.

Chemistry
1 answer:
lozanna [386]3 years ago
3 0

Answer:

B

C

Explanation: they both are things that we understand but dont know how they are fully made of.

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The ideal gas constant, R has several different values that could be used. Which quantity causes these differences?
givi [52]

Answer:

\boxed{\text{Pressure and volume}}

Explanation:

The measure of R is always the same, but the numbers may differ depending on the units you use.

For example, in SI units, R = 8.314 Pa·m³K⁻¹mol

If your measurement uses different units, you must either convert your units to SI or use a value of R consistent with your units.

If you use bars and litres,                       R = 0.083 14   bar·L·K⁻¹mol⁻¹.

If you use kilopascals and litres,            R = 8.314        kPa·L·K⁻¹mol

If you use atmospheres and litres,        R = 0.082 06 L·atm·K⁻¹mol⁻¹.

If you use Torr and cubic centimetres, R = 62 368     Torr·cm³ K⁻¹mol⁻¹.

The only units that don't change are "K⁻¹mol⁻¹".

\text{The quantities that affect the value of R are }\boxed{\textbf{pressure and volume}}

4 0
4 years ago
In covalent bonding, electrons are shared within molecules. This is because..
avanturin [10]

Answer:

You're answer is B.

Explanation:

Covalent Bonds share a negative and positive ion.

6 0
3 years ago
A certain photon has a frequency of 634x1012 Hz. What is the photon's wavelength in a vacuum? Enter your answer in nm (x10-9 m).
Shtirlitz [24]
<h3>Answer:</h3>

4.73 × 10^4 m

<h3>Explanation:</h3>

From the question;

Frequency of the photon = 634 × 10^12 Hz

We are required to calculate the wavelength of the photon.

We need to know the relationship between wavelength and frequency of a wave.

The relationship between f and λ is given by;

c = fλ

Where c, is the speed of light, 2.998 × 10^8 m/s

Therefore, to get the wavelength we rearrange the formula such that;

λ = c ÷ f

  = 2.998 × 10^8 m/s ÷ 634 × 10^12 Hz

  = 4.73 × 10^-5 m

But we require wavelength in nm

1 M = 10^9 nm

Therefore;

Wavelength = 4.73 × 10^-5 m × 10^9 nm/m

                    = 4.73 × 10^4 m

Hence, the photon's wavelength is 4.73 × 10^4 m

4 0
3 years ago
Which of the following statements is true?
Flauer [41]

Answer:

D. Q does not depend on the concentration or partial pressures of reaction components

8 0
3 years ago
Which of the following is a physical change?
MissTica

Answer:

boiling water

Explanation:

6 0
3 years ago
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