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irina [24]
1 year ago
5

Which of the following CAN NOT be considered a single phase?

Chemistry
1 answer:
Tomtit [17]1 year ago
7 0

Answer:

b

Explanation:

Heterogeneous is a mixture of two or more things (phases)...the others are all one phase

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What is the formula mass of silver
Olegator [25]
The formula mass of silver is 107.8682 g/mol
3 0
3 years ago
Certain atoms emit photons of light with an energy of 3.820 ✕ 10−19 J. Calculate the frequency (in Hz) and wavelength (in nm) of
charle [14.2K]

Answer:

ν = 5,765x10¹⁴ Hz

λ = 520 nm

230,0 kJ/mole

Explanation:

To convert energy yo frequency you need to use:

E = hν

Where E is energy (3,820x10⁻¹⁹ J)

h is Planck's constant (6,626x10⁻³⁴ Js)

And ν is frequency, replacing ν = 5,765x10¹⁴ s⁻¹ ≡ 5,765x10¹⁴ Hz

To convert frequency to wavelength:

c = λν

Where s is speed of light (2,998x10⁸ ms⁻¹)

ν is frequency (5,765x10¹⁴ s⁻¹)

And λ is wavelength, replacing: λ = 5,200x10⁻⁷ ≡ 520 nm

If 1 photon produce 3,820x10⁻¹⁹ J, in mole of photons produce:

3,820x10⁻¹⁹ J ×\frac{6,022x10^{23}}{1 mole} = 230040 J/mole ≡ 230,0 kJ/mole

I hope it helps!

4 0
3 years ago
Pleaseeee helppp
Dmitry [639]

A chemical change

Explanation:

In this reaction, a chemical change has occurred, here are some indicators of chemical changes from the reaction;

Chemical changes are changes in which new products are formed.

  • Formation of bubbles and precipitates: these are new substances that indicates a chemical change. The bubbles and insoluble precipitate are good indicators of chemical change.
  • A temperature change that is large; This is also typifies chemical changes. When temperature rises in reaction, a chemical change has occurred.
  • The bubbles and precipitates cannot be combined to give the reactants. The reaction is irreversible.

learn more:

Chemical change brainly.com/question/9388643

#learnwithBrainly

4 0
3 years ago
A microwave can have a frequency of 3.8 X 1010Hz. How much energy does this microwave give off in joules?
Marina86 [1]

Answer:

2.52 x 10^{-23} J

Explanation:

The energy given off by the microwave can be determined by the application of Planck's energy formula:

E = hf

where: E is the required energy, h is Planck's constant (6.626 x 10^{-34}m^{2}Kg/s), and f is the frequency (3.8 x 10^{10} Hz).

So that;

E = 6.626 x 10^{-34} x 3.8 x 10^{10}

  = 2.51788 x 10^{-23}

Therefore, the energy released by the wave is 2.52 x 10^{-23} J.

3 0
3 years ago
what does a set of four quantum numbers tell you about an electron. compare and contrast the locations and properties of two ele
daser333 [38]
Look on ///// quizlet.com
7 0
3 years ago
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