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miss Akunina [59]
3 years ago
11

HAaaaaaaaaaaaLPPP thank you.

Physics
2 answers:
lara31 [8.8K]3 years ago
7 0
15 guesting i think it not right
Nataly [62]3 years ago
5 0

mass of product= 40 +23= 63 grams

Explanation:

we use the law of conservation of mass which says that mass can neither be created and nor destroyed.So sum of mass of all the reactants is equal to the sum of mass of all the products.

Here sum of mass of reactants= 40+23= 63 grams

so the mass of products=63 grams

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Do the proton and the neutron have exactly the same mass? How do the masses of the proton and the neutron compare to the mass of
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Answer:

Explanation:

mas of proton = 1.673 x 10^-27 kg

mass of neutron = 1.675 x 10^-27 kg

mass of electron = 9.1 x 10^-31 kg

(a) the mass of proton and the mass of neutron is not exactly same.

(b) mass of proton = 1838.46 x mass of electron

mass of neutron = 1840.65 x mass of electron

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(d) The greatest contribution to the chemical properties of an atom is due to the electrons.

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What is the energy of light that must be absorbed by a hydrogen atom to transition an electron from n = 3 to n = 5?
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Answer:

The energy absorbed by a hydrogen atom is 1.549 X10⁻¹⁹ J

Explanation:

Using Bohr's equation; the energy absorbed by the hydrogen atom can be calculated as follows:

\delta E = (\frac{1}{n_2{^2}} -\frac{1}{n_1^{2}})13.6eV

When an electron moves from a lower energy level to a higher energy level, energy is absorbed by the atom.

Lower energy level (n₂) = 3

Higher energy level (n₁) = 5

1 eV = 1.602X10⁻¹⁹ C

\delta E = (\frac{1}{3{^2}} -\frac{1}{5^{2}})13.6X1.602X10^{-19}

ΔE = 1.549 X10⁻¹⁹J

The energy absorbed by a hydrogen atom  to transition an electron from n = 3 to n = 5 is 1.549 X10⁻¹⁹ J

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