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stiv31 [10]
3 years ago
5

10. What is the mass number, symbol, and

Chemistry
2 answers:
Kryger [21]3 years ago
8 0

Answer:

the element is radon is symbol is RN if charge is + 2 and its mass number is 86 I guess I've helped you

Lelechka [254]3 years ago
8 0

Explanation:

mass number = sum of protons and neutrons

= 87 + 136

= 223

chemical symbol = Fr

ion charge = +1 (because it has one more proton than electron)

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Now we have to calculate the limiting and excess reagent.

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From the balanced reaction we conclude that

As, 1 mole of N_2 react with 3 mole of H_2

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Now we have to calculate the mass of NH_3

\text{ Mass of }NH_3=\text{ Moles of }NH_3\times \text{ Molar mass of }NH_3

\text{ Mass of }NH_3=(7142.86moles)\times (17g/mole)=121428.62g=121.429kg

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