Which statements are true of the reactions in the Sun? Check all that apply
A. They are fusion reactions.
B. They occur only between helium atoms.
C. Hydrogen atoms are produced.
D. The reactions occur because of very high temperatures.

Empirical formula is C8H20Pb

Explanation:

Mass of C = molar mass of C/molar mass of CO2 x mass of CO2

= 12.01/44.01 x 5.027

= 1.372 g

Mass of H = 2 x molar mass of H/molar mass of H2O x mass of H2O  

= 2 x 1.008/18.02 x 2.572

= 0.288 g

Mass of Pb = mass of sample - mass of C - mass of H

= 4.617 - 1.372 - 0.288

= 2.957 g  

Since moles = mass/molar mass

Moles of C : H : Pb = 1.372/12.01 : 0.288/1.008 : 2.957/207.21

= 0.1142 : 0.2857 : 0.01427

= 8 : 20 : 1

Empirical formula is C8H20Pb