Aspirin is made commercially by adding acetic anhydride to an aqueous solution of salicylic acid. If 200. g of acetic anhydride is added to 138 g of salicylic acid what is the theoretical yield

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?