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Illusion [34]
3 years ago
5

What are the elements of scientific method?​

Chemistry
1 answer:
Digiron [165]3 years ago
7 0

Answer:

The basic steps of the scientific method are: 1) make an observation that describes a problem, 2) create a hypothesis, 3) test the hypothesis, and 4) draw conclusions and refine the hypothesis.

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Which of the following is most likely a chemical reaction?
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Two solid powders are combined and shaken. The substances form a mixture.

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The 3 components of air
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Nitrogen (around 78%), Oxygen (around 21%), and Argon (around 1%).

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A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.05 nm. It then gives off a photon having a wave
vodka [1.7K]
Absorbed photon energy
Ea = hc/λ.. (Planck's equation)
Ea = hc / 92.05^-9m 

<span>Energy emitted
Ee = hc/ 1736^-9m </span>

Energy retained ..
∆E = Ea - Ee = hc(1/92.05<span>^-9 - 1/1736^-9) </span>
<span>∆E = (6.625^-34)(3.0^8) (1.028^7)
∆E = 2.04^-18 J </span>

<span>Converting J to eV (1.60^-19 J/eV)
 ∆E = 2.04^-18 / 1.60^-19
∆E = 12.70 eV </span>

<span>Ground state (n=1) energy for Hydrogen = - 13.60eV </span>

<span>New energy state = (-13.60 + 12.70)eV = -0.85 eV </span>

<span>Energy states for Hydrogen
En = - (13.60 / n²) </span>

n² = -13.60 / -0.85 = 16
n = 4
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3 years ago
Which of the following best describes how further studies supported the work done by Max Planck in the field of quantum mechanic
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Answer:

Neils Bohr determined that electrons inhabit distinct energy levels.

Explanation:

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Placing a sample of iron (II) oxide into a graduated cylinder makes the water volume increase 12.0 mL. The weight of the sample
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Answer:6.38

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