Question

⦁ Explain what the coefficients in a balanced equation represent and how they can be used in ratios.
⦁ Use coefficients from a balanced equation as a mole ratio in dimensional analysis calculations.
⦁ Solve a variety of stoichiometry calculations involving moles and mass.

Answer 1

Chemical change- any change that results in a new formation of a substance.
For ex. burning paper.

Physical change- rearranging molecules but doesn't affect its internal structure.
For ex. splashing water in your hair. Or, dicing an apple. you're changing it but it's still the same thing.

Chemical change- breaking down or creating new chemical bonds between atoms like
iron rusting or eggs cooking