A student makes the claim that if we want to accelerate a heavy object and a light object the same amount, more force is needed to accelerate the heavy object. Which of the following observations provides the best evidence to support this claim? A force is applied to an object sitting on a smooth surface, causing it to accelerate. A greater force is needed to accelerate the same object on a rough surface. A force was applied to accelerate an object. A greater force was required to give the object a greater acceleration. A force was applied to accelerate an object. A greater force was required to give the same acceleration after mass was added to the object. A force was applied to one side of an object, causing it to accelerate. An equal force was applied to the opposite side, causing it to stop.

Straightforward questions answered in the powerpoint slidesreaction: heating the starting materials under refluxwhat does it mean to heat under reflux? why do we choose water as the reflux solvent? what are boiling chips used for? why do we put a condenser on top of the reaction? why do we add heat and let the reaction stir for 30 minutes? why do we add sulfuric acid to the reaction after it cools as opposed to when it’s still hot? separation: filtration of precipitatewhy don’t we do an aqueous and organic extraction in the separatory funnel? why do you rinse the salicylic acid on the filter with ice cold water? purification: recrystallization of salicylic acid (no hot filtration needed)what is the difference in the amount of room temperature water vs. boiling water needed to dissolve the salicylic acid (assume a 1.2 gram yield of salicylic acid)? remember, in the lab if you need x ml of boiling water to dissolve a solid, then you should add a little more (definitely no more than 1.5 times the theoretical amount) to ensure it doesn’t recrystallize prematurely.analysis: melting point of salicylic acidwhat can you conclude if the melting point of the salicylic acid you just synthesized is 152-155oc and the 1: 1 mix of your product and “synthetic” salicylic acid is 151-154oc?

How is an endothermic reaction identified

Hno2 + caco3 = h2co3 + ca(no2) can someone balance this