3 years ago

Cereal is an example of what type of matter?

Chemistry

2 answers:

BARSIC [14]3 years ago

6 0

Cereal is an example of heterogeneous mixture since you can separate the pieces by either color, size, shape, etc..

Elena L [17]3 years ago

5 0

A heterogeneous mixture since you can separate the ingredients that make it up.

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A photon has a wavelength of 750 no. What is the energy in joules

zhuklara [117]

Answer:

750

Explanation:

750

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3 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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Which of these is a chemical property of a substance?

dlinn [17]

Answer:

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Explanation:

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Olivia, a Latina student, is told that she can check only two books out of the library at a time, but Leann, a white student, is

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Answer:

Explanation:

the others are rude, and rather support this, while a helps to support the ending of white privlige

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Explanation:

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