248g Ag₂S ----------- 216g of Ag
10g Ag₂S ------------ x
x = 10g*216g/248g ≈ 8,71g
“The trapping of the suns warmth in a planets lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planets surface.”
Objects in the fountain appear to be somewhere but isnt