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3 years ago

13

Please some one help me plx

1 answer:

Mashcka [7]3 years ago

8 0

Ok I will and your welcome

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Which of these requires accurate coefficients in a reaction?

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Answer:

A: molar ratio

Molar ratios state the proportions of reactants and products that are used and formed in a chemical reaction.

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4 years ago

What is the density of a liquid that has a mass of 27g and a volume of 30mL?

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8 0

3 years ago

34. An electron in the 3d state of the hydrogen atom has a radial part of the wave function of the form A r2 exp(-r/3ao). What i

nikdorinn [45]

Answer: Option (e) is the correct answer.

Explanation:

Formula to calculate radius is as follows.

p(r) = $Ar(r^{2}e^{\frac{-r}{3a_{o}}}$

= $Ar^{3}e^{\frac{-r}{3a_{o}}}$

$\frac{dp(r)}{dr}$ = 0

$Ar^{3}e^{\frac{-r}{3a_{o}}}(\frac{-1}{3a_{o}}$ + $Ae^{\frac{-r}{3a_{o}}}(3r^{2})$ = 0

$\frac{Ar^{3}}{3a_{o}}e^{\frac{-r}{3a_{o}}}$

= $3Ar^{2}e^{\frac{-r}{3a_{o}}}$

r = $9a_{o}$

Thus, we can conclude that most likely radius at which the electron would be found is $9a_{o}$ .

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3 years ago

Why are both absolute dating and relative dating used to determine the age of fossils?

PilotLPTM [1.2K]

<span>they assign a numerical date to each rock layer studied.</span>

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3 years ago

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