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gregori [183]
3 years ago
7

On a camping trip, Marta roasts a marshmallow in the campfire. The marshmallow grows, and then turns black.

Chemistry
2 answers:
Setler [38]3 years ago
6 0

Answer

D

Explanation:

Mandarinka [93]3 years ago
4 0

Answer:

The answer is D.

Explanation:

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What’s the molar mass of Lead-208
Degger [83]
Lead is a basic metal and almost 11 isotopes of Lead are reported. The isotopes with greater natural abundance are as follow;

1) ²⁰⁸Pb with abundance 52.4 %

2) ²⁰⁶Pb with abundance 24.1 %

3) ²⁰⁷Pb with abundance 22.1 %

4) ²⁰⁴Pb with abundance 1.4 %

Molar mass of ²⁰⁸Pb:

Molar mass of any element is the total of number of protons, neutrons and electrons.
As, number of protons in Lead are 82 then in ²⁰⁸Pb isotope number of neutrons are...

# of Neutrons  =  M.mass - # of protons

# of Neutrons  =  208 - 82

# of Neutrons  =  126

Result:

Molecular Mass of Lead (²⁰⁸Pb) is 208 amu.

# of Protons in ²⁰⁸Pb  = 82

# of Neutrons in ²⁰⁸Pb = 126
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