Chemistry Stoichiometry and Chemical Equations

These flashcards cover significant concepts related to stoichiometry and balancing chemical equations in chemistry.

What is the relationship between moles and particles according to Avogadro's number?

1 mole = 6.022 x 10^23 particles (atoms or molecules)

What is a mole in terms of volume at STP?

1 mole = 22.4 L @ STP (Standard Temperature and Pressure)

What do coefficients in a chemical equation represent?

Coefficients indicate the number of molecules or formula units of a substance.

What do subscripts indicate in a chemical formula?

Subscripts tell the number of atoms of each element in a molecule or formula unit.

How should chemical equations be balanced?

By balancing the number of atoms of each element on both sides without changing the subscripts of compounds.

What is the law of conservation of mass?

Matter cannot be created or destroyed in a chemical reaction, so the total mass of reactants equals the total mass of products.

How do you convert grams to moles?

Use the formula: moles = mass (g) / molar mass (g/mol).

What is a limiting reactant?

The reactant that is completely consumed first in a chemical reaction, limiting the amount of product formed.

What are the states of matter commonly represented in chemical equations?

Solid (s), liquid (l), gas (g), and aqueous (aq) for substances dissolved in water.

What happens if you change the subscripts in a chemical formula?

Changing subscripts alters the composition and identity of the compound.