3 years ago

Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?

Chemistry

1 answer:

Yuri [45]3 years ago

7 0

Answer:

(carbon dioxide → carbon + oxygen. (carbon dioxide + carbon → oxygen.

Explanation:

I'm not really sure if this is the answer

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What is the role of neutrons in the nucleus of an atom?

zhenek [66]

Neutrons keep the Protons "in check", meaning Protons hold a very strong repulsive positive charge. The Neutrons counteract the repulsive force within a small space to keep the Nucleus stable.

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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

What do these two changes have in common?

Varvara68 [4.7K]

ok fine ill leave

Explanation:

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2 years ago

In which of the following is the symbol for the ion and the number of electrons it contains given correctly?

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The answer is A. .....

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Which substance is most likely a lipid? -long chains of molecules composed of carbon, hydrogen, and oxygen atoms -compounds that

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Answer:

The answer is

Explanation:

- A nonpolar organic compound that is insoluble in water

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