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Charra [1.4K]
3 years ago
15

The atomic number of nitrogen is 7. The mass is 14.01. This means that a) All nitrogen atoms have exactly 7 neutrons b) A small

percentage of nitrogen atoms have fewer than 7 neutrons c) A small percentage of nitrogen atoms have more than 7 neutrons d) Some nitrogen atoms have fewer than 7 electrons
Chemistry
2 answers:
suter [353]3 years ago
7 0
There are 7 protons and electrons in a nitrogen atom.
adelina 88 [10]3 years ago
5 0
This means that there are 7 protons in the nucleus of a nitrogen atom. 
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Neon atoms are known to produce a mass spectrum that consists of three peaks at m/z values of 20, 21 and 22, with the relative a
wel

Answer:

Explanation:

m / z = 20 , 21 , 22

m / 1 = 20 , 21 , 22

m = 20 , 21 , 22 .

ratio of isotopes = 112 : 0.21 : 11.1

Average atomic mass = (112 x 20 + .21 x 21 + 11.1 x 22) / (112 + .21 + 11.1 )

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An aqueous KNO3 solution is made using 75.1 g of KNO3 diluted to a total solution volume of 1.95 L .Calculate the molarity of th
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Answer:

- M=0.38M

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Explanation:

Hello,

In this case, since the molar mass of potassium nitrate is 101.1 g/mol, we can compute the molarity as follows:

M=\frac{75.1g*\frac{1mol}{101.1g} }{1.95L} \\\\M=0.38M

Moreover, as the mass percent is computed as:

\% m=\frac{m_{KNO_3}}{m_{solution}} *100\%

Thus, by using the given density of the solution, we obtain:

\% m=\frac{75.1g}{1.95L*\frac{1000mL}{1L}*\frac{1.05g}{1mL}  } *100\%\\\\ \% m=3.67\%

Regards.

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