Calculate the ratio of the velocity of helium(He) atoms to the velocity of neon(Ne) atoms at the same temperature. molar mass of He= 4, molar mass of Ne=20

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Freezing 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.