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Lapatulllka [165]

2 years ago

6

What is the smallest unit of a compound like carbon dioxide (CO2), water (H2O), nitrogen dioxide (NO2) that still have all the p

roperties of that compound? Choose the answer below.
A: a nucleus
B: an atom
C: an element
D: a molecule

2 answers:

pogonyaev2 years ago

7 0

D

Hope this is helpful

spayn [35]2 years ago

6 0

D

Hope this helps

Mark brainliest please

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A factor that keeps a population size from growing too large is called a ______ _______.

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Convert 45 kL to mL (must show work)

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The substance that is doing the dissolving is referred to as?

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Answer:

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Explanation:

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3 years ago

A student sees a commercial that claims a new dishwasher is energy efficient. Compared to less efficient dishwashers, this means

zaharov [31]

It’s either a or b but I’m not sure

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2 years ago

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n =

Lady bird [3.3K]

Answer:

$4.86\times10^{-7}\ \text{m}$

Explanation:

R = Rydberg constant = $1.09677583\times 10^7\ \text{m}^{-1}$

$n_1$ = Principal quantum number of an energy level = 2

$n_2$ = Principal quantum number of an energy level for the atomic electron transition = 4

Wavelength is given by the Rydberg formula

$\lambda^{-1}=R\left(\dfrac{1}{n_1^2}-\dfrac{1}{n_2^2}\right)\\\Rightarrow \lambda^{-1}=1.09677583\times 10^7\left(\dfrac{1}{2^2}-\dfrac{1}{4^2}\right)\\\Rightarrow \lambda=\left(1.09677583\times 10^7\left(\dfrac{1}{2^2}-\dfrac{1}{4^2}\right)\right)^{-1}\\\Rightarrow \lambda=4.86\times10^{-7}\ \text{m}$

The wavelength of the light emitted is $4.86\times10^{-7}\ \text{m}$ .

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2 years ago