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Misha Larkins [42]
3 years ago
15

A hypothetical element has three main isotopes with mass numbers of 51, 53, and 54. If 15.00% of the isotopes have a mass number

of 51 amu and 30.00% of the isotopes have a mass of 53 amu, what atomic weight should be listed on the periodic table for this element?

Chemistry
1 answer:
Eva8 [605]3 years ago
5 0

Answer: 53.25

Explanation: Please see attachment for explanation. Thanks.!

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Question 5 (1 point)
Aleksandr-060686 [28]

Answer : The pressure it exert under these new conditions will be, 87 atm

Explanation :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

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P_2 = final pressure of gas = ?

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V_2 = final volume of gas = 20 L

T_1 = initial temperature of gas = 25^oC=273+25=298K

T_2 = final temperature of gas = 0^oC=273+0=273K

Now put all the given values in the above equation, we get:

\frac{19atm\times 100L}{298K}=\frac{P_2\times 20L}{273K}

P_2=87atm

Therefore, the pressure it exert under these new conditions will be, 87 atm

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EASY 8TH GRADE SCIENCE!
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The answer is either A or D. Hope this helps

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