Silicon and hydrogen form many compounds, Si Hy, to find one you take a 6.22 g sample and burn it in oxygen. The results produced 12.02 g of Sio, and 5.40 g of H,0. If the experimental
molecular mass is 62.2 g/mol, what is the empirical and molecular formula of this compound?
SiH, +02 SiO, + H20

Claim of polic

The answer is d- principle of faunal succession.

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.