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3 years ago

A certain element has 52 protons, 52 electrons, and 76 neutrons. its atomic mass is _____. 52 76 128 104

Chemistry

2 answers:

kifflom [539]3 years ago

5 0

Pretty sure it is 128 hope this helps you :D

Nikitich [7]3 years ago

4 0

Answer:

Atomic mass is 128

Explanation:

Atoms are composed of fundamental subatomic particles: protons, neutrons and electrons.

They are represented by a standard nuclear notation which includes the symbol of the element, its atomic number and atomic mass.

i.e. $_{Z}^{A}\textrm{X}$

Z = atomic mass = number of protons + number of neutrons -----(1)

A = atomic number = number of protons = number of electrons----(2)

<u>Given data:</u>

Protons = 52

Electrons = 52

Neutrons = 76

Based on equation (1)

Atomic mass = 52 + 76 = 128

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Nady [450]

The amount of heat released by the sample has been 22.54 kJ. Thus, option C is correct.

The specific heat has been defined as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.

The specific heat has been expressed as:

$q=mc\Delta T$

<h3 /><h3>Computation for the heat absorbed</h3>

The iron and calorimeter are in side the closed system. Thus, the energy released by the sample, has been equivalent to the energy absorbed by the calorimeter.

$q_{released}=q_{absorbed}\\
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Substituting the values for heat released:

$q_{released}= 1350\;\text g\;\times\;5.82\;\text J/\text g^\circ \text C\;\times\;2.87^\circ \text C\\
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Learn more about specific heat, here:

brainly.com/question/2094845

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