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Gelneren [198K]
3 years ago
6

How many neutrons are in a nucleus of uranium-238?

Chemistry
1 answer:
LenaWriter [7]3 years ago
8 0

Answer:

146

Explanation:

The mass of uranium- 238  is  238  mass units. The total mass of an element is the sum of its protons and neutrons.  There are  92  protons in this isotope, and its mass is  238 , so that means that there are,  238 − 92 = 146  neutrons. Thus, as weird as it may seem, the answer must be D.

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Answer:

a) increase exponentially.

Explanation:

The vapor pressure is depend only on temperature.

The vapor pressure of liquid does not depend upon amount of liquid. For example whether the liquid is 50 g or 30 g its vapor pressure will remain same according to the temperature.

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Answer:

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Explanation:

constituent elements                    N              O               C                H

Mass composition                     0.420        0.480         0.540         0.135

mole ratio                                   0.42/14       0.48/16      0.54/12         0.135/1

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dividing by the smallest           0.03/0.03     0.03/0.03    0.045/0.03 0.135/0.03

ratio                                      =        1                      1                1.5                 4.5

                                             =        1                      1                  2                   5

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