3 years ago

Suppose you had a mixture of sand and small, hollow beads. How might you separate the mixtures

Chemistry

1 answer:

umka21 [38]3 years ago

3 0

Answer:

I am not sure if this is the answer but maybe oil?

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HELP!!!! please omg

OverLord2011 [107]

Answer:

I believe it's A. to reduce air bubbles. Tbh, it's been a while

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3 years ago

When an electron in a 2p orbital of a particular atom makes a transition to the 2s orbital, a photon of approximate wavelength 6

Mariulka [41]

Answer:

The energy difference between these 2p and 2s orbitals is $3.07\times 10^{-19} J$

Explanation:

Wavelength of the photon emitted = $\lambda =646.3 nm =646.3\times 10^{-9} m$

Energy of the photon will corresponds to the energy difference between 2p and 2s orbital = E

Energy of the photon is given by Planck's equation:

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

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

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

$E=\frac{6.626\tiomes 10^{-34} Js\times 3\times 10^8 m/s}{646.3\times 10^{-9} m}$

$E=3.07\times 10^{-19} J$

The energy difference between these 2p and 2s orbitals is $3.07\times 10^{-19} J$

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3 years ago

Which general formula represents the functional group in a carboxylic acid?

asambeis [7]

Answer:

The answer is RCOOH

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2 years ago

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When iron metal reacts with oxygen, the reaction can form Fe2O3. Write a balanced chemical equation for this reaction, and find

ryzh [129]

The balanced equation is
4Fe+3O₂⇒2Fe₂O₃

We know that the mole of Fe₂O₃ is 6, and since the ratio between oxygen and Fe₂O₃ is 3:2, we can see that

3:2 = x:6 (3 oxygen moles can make 2 Fe₂O₃ moles = x oxygen moles can make 6 Fe₂O₃ moles)

Multiply outside and inside (3*6 , 2*x) and put them on opposing sides of the equation

2*x = 3*6
2x=18
x=9
Therefore 9 moles of oxygen is needed.

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2 years ago

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When a student combed his dry hair for a long time, his hair began to stand up. Which of these has MOST LIKELY happened? A) The

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B.

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3 years ago

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Suppose you had a mixture of sand and small, hollow beads. How might you separate the mixtures ​

Suppose you had a mixture of sand and small, hollow beads. How might you separate the mixtures