Please help me answer this question! I don’t understand it at all!

Chemistry

1 answer:

pentagon [3]3 years ago

7 0

The uncertainty principle is one of the most famous (and probably misunderstood) ideas in physics. It tells us that there is a fuzziness in nature, a fundamental limit to what we can know about the behaviour of quantum particles and, therefore, the smallest scales of nature. Of these scales, the most we can hope for is to calculate probabilities for where things are and how they will behave. Unlike Isaac Newton's clockwork universe, where everything follows clear-cut laws on how to move and prediction is easy if you know the starting conditions, the uncertainty principle enshrines a level of fuzziness into quantum theory.
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A chemist identifies compounds by identifying bright lines in their spectra. She does so by heating the compounds until they glo

allsm [11]

Answer:

PART A: 412.98 nm

PART B: 524.92 nm

Explanation:

The equation below can be used for a diffraction grating of nth order image:

n*λ = d*sinθ $_{n}$

Therefore, for first order images, n = 1 and:

λ = d*sinθ $_{1}$ .

The angle θ $_{1}$ can be calculated as follow:

tan θ $_{1}$ = 9.95 cm/15.0 cm = 0.663 and

θ $_{1}$ = $tan^{-1}$ (0.663) = 33.56°

Thus: d =λ/sin θ $_{1}$ = 461/sin 33.56° = 833.97 nm

PART A:

For a position of 8.55 cm:

tan θ $_{1}$ = 8.55 cm/15.0 cm = 0.57 and

θ $_{1}$ = $tan^{-1}$ (0.57) = 29.68°

Therefore:

λ =d*sin θ $_{1}$ = 833.97*sin 29.68° = 412.98 nm

PART B:

For a position of 12.15 cm:

tan θ $_{1}$ = 12.15 cm/15.0 cm = 0.81 and

θ $_{1}$ = $tan^{-1}$ (0.81) = 39.01°

Therefore:

λ =d*sin θ $_{1}$ = 833.97*sin 39.01° = 524.92 nm

6 0

3 years ago

Which element would most likely have a positive electron affinity?

krok68 [10]

I believe the correct answer from the choices listed above is the first option. The element that would most likely have a positive electron affinity would be sodium, Na. Electron affinity is defined as the change in energy of a neutral atom when an electron is added to the atom.

7 0

3 years ago

Read 2 more answers

Iron has many isotopes but only 4 are found in significant amounts in naturally found mixtures. The amounts by mass percent are:

AnnZ [28]

Answer:

The average mass of iron to be is 54.76 amu.

Explanation:

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$