The answer is true. Eggs remain in the body all throughout life cycle.
The mass number of the daughter atom formed from the alpha decay of a certain radioactive atom that has 90 protons and 142 neutrons is 228.
<h3>What is alpha decay?</h3>
Alpha decay of a radioactive material is the release of an alpha particle that posseses mass number of 4 and atomic number of 2.
According to this question, a certain radioactive atom that has 90 protons and 142 neutron undergoes alpha decay. This means that the mass number of the daughter atom will be as follows:
Mass number of radioactive atom = 142 + 90 = 232
Mass number of daughter atom = 232 - 4 = 228
Therefore, the mass number of the daughter atom formed from the alpha decay of a certain radioactive atom that has 90 protons and 142 neutrons is 228.
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No. of atoms= no. of moles*avogadros number
= 0.60/56*NA
Answer:
96 torr
Explanation:
After 48 hours, we are told, the pressure is 488 torr. Since we started with 392 torr of arsine, we can conclude there is an increase in pressure cause by the arsine producing hydrogen and the solid As.
We can calculate the equilibrium pressure of H₂ if we account for the total pressure in terms of the stoichiometry of the equilibrium equation:
2 AsH₃(g ) ⇆ 2 As(s) + 3 H2(g)
Initial p (atm) 392 0
Change -2x 3x
Equilibrium 392 - 2x 3x
and the total pressure at equilibrium is the sum of the pressure of the gasses arsine and hydrogen:
488 = (392 - 2x)+ 3x
488 - 392 = x
x = 96
Therefore the equilibrium pressure of H₂ is 3 x 96 = 288 torr
