Radioactivity or radioactive decay is the process that occurs when unstable isotopes or atoms release energy by emitting radiations such as ,gamma radiations, alpha radiations and beta radiations to attain stability. Therefore, in this case decay is likely to occur when a given atom has two many neutrons in its nucleus in order to attain stability.
Answer:
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Explanation:
Answer:
6.178 g.
Explanation:
- KCl is ionized in the solution as:
<em>KCl → K⁺ + Cl⁻.</em>
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∴ [KCl] = [K⁺] = [Cl⁻] = 0.193 M.
<em>Molarity is defined as the no. of moles of the solute per 1.0 L of the solution.</em>
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∵ M = [(mass/molar mass)KCl][(1000)/(V of the solution)].
<em>∴ mass of KCl = (M)(molar mass of KCl)(V of the solution)/1000</em> = (0.193 M)(74.55 g/mol)(430.0 mL)/1000 = <em>6.178 g.</em>
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Answer:
12.4×10^3 V
Explanation:
From E=hc/wavelength= eV
The voltage becomes
V= hc/e* wavelength
V= 6.63*10^-34*3*10^8/1.6*10^-19*1*10^-10
Note that the energy of the photon is transferred to the electron. That is the basic assumption we have applied in solving this problem. The kinetic energy of the electron is equal to the product of the electron charge and the acceleration potential.
