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zheka24 [161]
3 years ago
13

Calculate the total binding energy, and the binding energy per nucleon, for 73Li. The masses of the atoms of 73Li and 11H are 7.

016004 u and 1.007825 u, respectively. The mass of a neutron is 1.008665 u.
Chemistry
1 answer:
charle [14.2K]3 years ago
8 0

Answer:

5.60 Mev

Explanation:

Binding Energy is termed as the total energy required for the breakdown of a nucleus to its component nucleons

From the given question;

There are 3H and 4n,

Therefore;

since the masses of the atoms are 7.016004 u and 1.007825 u,

Then

3(1.007825) + 4(1.008665) = 7.058135 u

( 7.058135 - 7.016004) × (931.5) = 39.24 MeV total biding energy.

The energy per nucleon is  therefore calculate as:

\frac {39.24 \ \  MeV }{7}

=5.60 Mev

Thus, the total binding energy is = 5.60 Mev

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A flask with a volume of 3.16 l contains 9.33 grams of an unknown gas at 32.0°c and 1.00 atm. What is the molar mass of the gas?
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Answer:

73.88 g/mol

Explanation:

For this question we have to keep in mind that the unknown substance is a <u>gas</u>, therefore we can use the <u>ideal gas law</u>:

PV=nRT

In this case we will have:

P= 1 atm

V= 3.16 L

T = 32 ªC = 305.15 ºK

R= 0.082 \frac{atm*L}{mol*K}

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So, we can <u>solve for "n"</u> (moles):

1~atm*3.16~L~=~n*0.082~\frac{atm*L}{mol*K}*305.15~K

n=\frac{1~atm*3.16~L~}{0.082~\frac{atm*L}{mol*K}*305.15~K}

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Now, we have to remember that the <u>molar mass value has "g/mol"</u> units. We already have the grams (9.33 g), so we have to <u>divide</u> by the moles:

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A filament of a light bulb is made from a pure sample of tungsten.
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Answer:

The correct options are:

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2) Element.

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5) Since it is given in the question itself that the sample is pure hence option 'E' is correct as chemical substance is a pure substance that has a homogeneous composition and the sample in the question is given as pure.

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