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Sunny_sXe [5.5K]
3 years ago
12

The amount of material left after two half-lives is one-half of the original amount. ____________________

Chemistry
2 answers:
Assoli18 [71]3 years ago
8 0
I think it is true because that seems like the right answer
choli [55]3 years ago
4 0

That statement is false. When an atom gains or loses electrons, the charged particle that results is called a molecule. The amount of material left after two half-lives is one-half of the original amount. Fission is the combining of two low-mass nuclei into one nucleus with a larger mass. I got that part from google for a more detailed response.

Hope this helps, if not, comment below please!!!

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Biphenyl, C12H10,C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6.C6H6. At 25 ∘C,25 ∘C, the vapor p
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Answer:

Vapour pressure of solution is 78.151 torr

Explanation:

Molar mass of biphenyl = 154.21 g

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19.2 g biphenyl = (19.2/154.21) moles of biphenyl = 0.125 moles of biphenyl

33.7 g of benzene = (33.7/78.11) moles of benzene = 0.431 moles of benzene

Total number of moles = (0.125+0.431) moles = 0.556 moles

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According to Roults law, vapour pressure of solution made from non-volatile solute = (mole fraction of solvent in solution)\times (vapour pressure of pure solvent)

Here solute is biphenyl and solvent is benzene

So, vapour pressure of solution = (0.775\times 100.84)torr = 78.151 torr

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