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3 years ago

What is the mass number of an atom with 7 protons, 8 neutrons, and 7 electrons?

Chemistry

2 answers:

docker41 [41]3 years ago

7 0

An atom of nitrogen-15 (15n) , isotope of regular nitrogen. It occurs. i hope what ive found helped, let me know what happens!

Y_Kistochka [10]3 years ago

4 0

What is the mass number of an atom with 7 protons, 8 neutrons, and 7 electrons?

A Nitrogen atom with 7 protons and 8 neutrons has a mass number of 15

That Should Be The Correct Answer :D

Hope I Helped

-Nullgaming650

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2 years ago

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2 years ago

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2 years ago

10. The Proton is special! What does it tell us? The proton tells me..

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Answer:

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3 years ago

nswer the following questions relating to HCl, CH3Cl, and CH3Br.HCl(g), can be prepared by the reaction of concentrated H2SO4(ag

alexdok [17]

Answer:

It is an example of double displacement reaction.

4.8 g of NaCl is needed to react.

Explanation:

Balanced reaction: $H_{2}SO_{4}(aq.)+2NaCl(s)\rightarrow 2HCl(g)+Na_{2}SO_{4}(aq.)$

Here, oxidation states of H, S, O, Na and Cl do not change during reaction. Hence it is not a redox reaction.

In this reaction, cations and anions of the reactants interchange their partners during reaction. Hence, it is an example of double displacement reaction.

As $H_{2}SO_{4}(aq.)$ remain in excess amount therefore NaCl (s) is the limiting reagent. Hence production of HCl entirely depends on amount of NaCl used.

Molar mass of HCl = 36.46 g/mol

So, 3.0 g of HCl = $\frac{3.0}{36.46}$ mol of HCl = 0.082 mol of HCl

According to balanced equation-

2 moles of HCl are produced from 2 moles of NaCl

So, 0.082 moles of HCl are produced from 0.082 moles of NaCl

Molar mass of NaCl = 58.44 g/mol

So, mass of 0.082 moles of NaCl = $(0.082\times 58.44)$ g = 4.8 g

Hence 4.8 g of NaCl is needed to react.

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3 years ago