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Effectus [21]
2 years ago
14

You have a 0.200mol piece of aluminum. How many atoms are present in the aluminum?

Chemistry
1 answer:
Scrat [10]2 years ago
3 0

0.2 × 6.022 × 10²³ = 12.044 × 10²² = 1.2044 × 10²³

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The energy of a photon is ________ proportional to its wavelength. The energy of a photon is ________ proportional to its freque
topjm [15]

Answer: Inversely  ,   Directly

Explanation:

The energy of a photon is inversely proportional to its wavelength and directly proportional to its frequency.

As can be seen from this equation;

E = hv  = h c / ∧

Where E = Energy of a photon

           v = Frequency

           h = Planck Constant

           c = speed of light

           ∧  = Wave length

4 0
3 years ago
Distinguish between mass and weight
yKpoI14uk [10]

Answer:

There is a basic difference, because mass is the actual amount of material contained in a body and is measured in kg, gm, etc. Whereas weight is the force exerted by the gravity on that object mg. Note that mass is independent of everything but weight is different on the earth, moon, etc.

3 0
3 years ago
Read 2 more answers
Please answer as soon as possible if you can
alexgriva [62]

Answer:

Second one

Explanation:

5 0
3 years ago
What is the magnitude of the electrostatic force between a singly charged sodium ion and an adjacent singly charged chlorine ion
Arisa [49]
To know the electrostatic force between two charges or between two ions, you can use the Coulomb's Law. The equation is F = k*q1*q1/r^2, where F is the electrostatic force, q1 and q2 are the charger for Na and Cl, and r is the distance between the centers of both atoms. In literature, the distance is 0.5 nm or 0.5 x 10^-9 meters. The charge for Na+ and Cl- is the same magnitude but different in sign. Since Na+ is a cation, its charge is +1.603x10^-19 C (the charge of an electron). For Cl- being an anion, its charge is -1.603x10^-19 C. The constant k is an empirical value equal to 9x10^9. Using the formula:

F = (9x10^9)(+1.603x10^-19)(-1.603x10^-19)/(0.5 x 10^-9)^2
F = -9.25 x 10^-10 Newtons

The negative denotes that the net force is more towards the Cl- ion.
5 0
2 years ago
Which is most likely to occur to native plants when the chemical composition of the soil they live in changes?
PSYCHO15rus [73]

Answer:

D

Explanation:

Both A and D are correct, because they will adapt from natural selection. Over time they will overcome the challenges of the new soil and be fine. however a few will die, but the best answer is D.

5 0
2 years ago
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