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3 years ago

When the first periodic table of the elements was published, the elements were arranged by atomic mass. Although

Chemistry

1 answer:

Oduvanchick [21]3 years ago

4 0

Its. a c but im not sure. ??.?

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Which expression represents this word phrase?

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Answer: B

The quotient is what you get when you divide two numbers by each other so therefore x divided by 9. And then 7 less than that number

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3 years ago

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W + BgCz2 --> WCz + Bg<br> Balance this equation

yanalaym [24]

Answer: W + BgCz2 arrow WCz + Bg

2 W + BgCz2 arrow 2 WCz + Bg

Explanation:

Cz has 2 so you balcne the other side of WCz.

Since you Balcanes the Cz you changed the W and you Balcanes the other W on the left side.

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3 years ago

Question 33 Saved

Tatiana [17]

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The third option

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If people have found more volcanic rock layers in the past that would mean that volcanic activity was more common in the past.

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3 years ago

What is the wavenumber of the radiation emitted when a hydrogen

LUCKY_DIMON [66]

Answer: Wavenumber of the radiation emitted is $0.08\times 10^{8}m^{-1}$

Explanation:

The relationship between wavelength and energy of the wave follows the equation:

$E=\frac{hc}{\lambda}$

where,

E = energy of the radiation = $1.634\times 10^{-18}J$

h = Planck's constant = $6.626\times 10^{-34}Js$

c = speed of light = $3\times 10^8m/s$

$\lambda$ = wavelength of radiation = ?

Putting values in above equation, we get:

$1.634\times 10^{-18}J=\frac{(6.626\times 10^{-34}Js)\times (3\times 10^8m/s)}{\lambda}\\\\\lambda=12.16\times 10^{-8}m$

$\bar {\nu}=\frac{1}{\lambda}=\frac{1}{12.16\times 10^{-8}}=0.08\times 10^{8}m^{-1}$

Thus wavenumber of the radiation emitted is $0.08\times 10^{8}m^{-1}$

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4 years ago

1) All atoms are _____.

Katyanochek1 [597]

All atoms are of <u>neutral charge, with an equal amount of protons and electrons.</u>

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3 years ago

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