Oquizy

What does this graph suggest if A and B has the same volume?

A had higher concentration of reactants A used a catalyst B used powdered reactants B was done at a higher temperature

Xinyi is testing rate of reaction for an unknow solid. She uses sample A (powdered solid) and sample B (same mass, large lumps) and obtains this graph.
Which conclusion is correct?

More powder means more product Powder reacts slower Powdered reactant increases rate Surface area has no effect on rate

From the graph, which is true if volume is the same?

X used more concentrated acid X was done at a lower temperature Y is more reactive Y used a catalyst

Which conclusion is correct?

Higher temperature reduces gas solubility Temperature changes activation energy and products Temperature increases both rate and yield Temperature only affects reaction rate

Which conclusion is correct?

MnO₂ decomposes H₂O₂ to a new product MnO₂ increases oxygen yield MnO₂ increases reaction rate MnO₂ raises activation energy

What does this show?

Activation energy remains unchanged Catalyst adds energy to curve Catalyst removes energy from particles More particles exceed activation energy when catalyst is used

Quiz: Chemistry - Rate Of Reactions