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3 years ago

Summarize the characteristics of each type of element below

Chemistry

1 answer:

aniked [119]3 years ago

7 0

What are the elements?

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What is the Molar mass of PbCO4

NNADVOKAT [17]

Answer:

207.2 g/mol

Explanation:

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3 years ago

What is the mass of a neutron? 1/2,000 amu 1 amu 2,000 amu 1/200 amu

pashok25 [27]

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1 amu is the correct answer

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3 years ago

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A family pool holds 10,000 gallons of water. How many cubic centimeters is this?

Ierofanga [76]

Answer:

3.785412e+7cm³

Explanation:

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2 years ago

. A bright violet line occurs at 435.8 nm in the emission spectrum of mercury vapor. What amount of energy, in joules, must be r

Tom [10]

Answer : The energy released by an electron in a mercury atom to produce a photon of this light must be, $4.56\times 10^{-19}J$

Explanation : Given,

Wavelength = $435.8nm=435.8\times 10^{-9}m$

conversion used : $1nm=10^{-9}m$

Formula used :

$E=h\times \nu$

As, $\nu=\frac{c}{\lambda}$

So, $E=h\times \frac{c}{\lambda}$

where,

$\nu$ = frequency

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

$\lambda$ = wavelength = $435.8\times 10^{-9}m$

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

Now put all the given values in the above formula, we get:

$E=(6.626\times 10^{-34}Js)\times \frac{(3\times 10^{8}m/s)}{(435.8\times 10^{-9}m)}$

$E=4.56\times 10^{-19}J$

Therefore, the energy released by an electron in a mercury atom to produce a photon of this light must be, $4.56\times 10^{-19}J$

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3 years ago

What type of air masses might make up the cold air mass in a cold front

Elena L [17]

Answer:

continental polar air masses

Explanation:

forms over Canada, move down from North Pole, bring bitterly cold and dry air to the northern United States during the winter.

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