Mass of evaporating dish #1: 35.687 g, Mass of evaporating dish #1 and dry sand: 36.122 so, what is the mass of sio2 (g) and percent by mass of sio2(%).

Idon’t know what the answer is i wish i could

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

Ahigh energy (high speed) particle (alpha or beta or neutron) are shot at the target;