Answer :

Answer:

2%

Explanation:

75% of the mass contains hydrogen 25% helium and all other elements comprising only of 2%

Answer:

C. 2 percent.

Explanation:

75% of the mass in the form of hydrogen

25% as helium

All other elements comprising only 2% of the total

Assume mass of the solar nebula = 100

Remaining % = 2%

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