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Questions and Answers
What is Avogadro's number and how is it related to the mole concept in chemistry?
What is Avogadro's number and how is it related to the mole concept in chemistry?
Avogadro's number is 6.022 x 10^23 and it is the number of particles (atoms, molecules, ions, etc.) in one mole of a substance. The mole concept is used to relate the mass of a substance to the number of particles it contains.
Explain the difference between an exothermic and an endothermic reaction.
Explain the difference between an exothermic and an endothermic reaction.
An exothermic reaction releases heat to the surrounding environment, while an endothermic reaction absorbs heat from the surrounding environment.
What is the difference between a homogeneous and a heterogeneous mixture?
What is the difference between a homogeneous and a heterogeneous mixture?
A homogeneous mixture has uniform composition throughout, while a heterogeneous mixture has non-uniform composition with visible different phases.
