Which formula equation represents the burning of sulfur to produce sulfur dioxide?
O S(s) + O2(9) A, 502(9)
O 2H2S(s) + 302(0) — 2H2011) +2502(9)
O 4FeS2 + 1102— 2Fe2O3 + 8502
O 2502(g) + O2(g) _V205, 2503(9)

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Calculate the number of moles of ethane in 100 grams

Two nails have identical sizes and shapes. in one nail, 20 percent of the domains are lined up. in the other nail, 80 percent of the domains are lined up. which has stronger magnetic force? first answer gets brainliest!