Introduction to balancing equations

Why is there a subscript of 2 next to Hydrogen and Chlorine?

• These elements are diatomic

• Tyler messed up

How is a chemical reaction expressed as a word equation?

• By listing the chemical formulas of reactants and products.

• By describing the reactants and products using their names.

• By showing the atomic structure of the molecules involved.

• By indicating the state of matter for each substance.

What is the chemical formula for hydrochloric acid?

• H2O

• H2

• Cl2

• HCl

What characteristic defines a balanced chemical equation?

• It has an equal number of molecules on both sides of the arrow.

• It has the same number of each type of atom on both sides of the arrow.

• It only involves gaseous reactants and products.

• It shows the precise state of matter for all substances.

Why is the equation balanced now? what does that mean?

• The number of atoms in the reactant side now equals the number of atoms on the product side

• there is an even amount of atoms

• at the subscripts are prime numbers

• each atom trained in yoga and are able to do amazing skills

Why is there a subscript of 2 next to the hydrogen and the oxygen?

• These are diatomic elements

• Tyler loves the #2

• Hydrogen would get jealous if only oxygen got a 2

Which of the following chemical equations is unbalanced?

• 2H2 + O2 → 2H2O

• H2 + O2 → H2O

• N2 + 3H2 → 2NH3

• C + O2 → CO2

What are the correct coefficients to balance the equation H2 + O2 → H2O?

• 1, 1, 1

• 2, 1, 2

• 1, 2, 1

• 2, 2, 2

What is a common mistake when balancing chemical equations?

• Adjusting the coefficients in front of compounds.

• Changing the subscripts within a chemical formula.

• Counting the number of atoms on each side of the equation.

• Using a chart to track atom counts.

When balancing the equation N2 + H2 → NH3 using a chart, what is the first step after listing the elements?

• Add coefficients to balance the hydrogen atoms.

• Write down the initial number of atoms for each element on both sides.

• Change the subscript of nitrogen to balance it.

• Multiply the entire NH3 molecule by 2.