A certain element has 52 protons, 52 electrons, and 76 neutrons. its atomic mass is _____. 52 76 128 104
2 answers:
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 = 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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Answer:
Explanation:
Hello there!
In this case, since these problems about gas mixtures are based off Dalton's law in terms of mole fraction, partial pressure and total pressure, we can write the following for hydrogen, we are given its partial pressure:
And can be solved for the total pressure as follows:
However, we first calculate the mole fraction of hydrogen by subtracting that of nitrogen to 1 due to:
Then, we can plug in to obtain the total pressure:
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