Podcast
Questions and Answers
Which of the following is NOT a method for balancing chemical equations?
Which of the following is NOT a method for balancing chemical equations?
- Adding or removing reactants or products
- Adding or removing charges (correct)
- Changing the subscripts of the reactants or products
- Adjusting coefficients
What is the first step in balancing a chemical equation?
What is the first step in balancing a chemical equation?
- Counting the number of atoms of each element on both sides
- Identifying the products
- Adjusting coefficients
- Identifying the reactants (correct)
What is the purpose of balancing a chemical equation?
What is the purpose of balancing a chemical equation?
- To ensure that the equation is written in the correct order
- To ensure that the number of atoms of each element on both sides is equal (correct)
- To ensure that the equation is written in the correct format
- To ensure that the equation is chemically stable
What is the coefficient of oxygen in the balanced equation for the combustion of methane?
What is the coefficient of oxygen in the balanced equation for the combustion of methane?
What is the coefficient of hydrogen in the balanced equation for the reaction between potassium permanganate and hydrogen peroxide?
What is the coefficient of hydrogen in the balanced equation for the reaction between potassium permanganate and hydrogen peroxide?
What is the coefficient of nitrogen in the balanced equation for the Haber process?
What is the coefficient of nitrogen in the balanced equation for the Haber process?
What is the mass of oxygen needed to react completely with 1.5 moles of aluminum in the following balanced equation? 4Al + 3O2 -> 2Al2O3
What is the mass of oxygen needed to react completely with 1.5 moles of aluminum in the following balanced equation? 4Al + 3O2 -> 2Al2O3
What mass of sodium chloride is produced from 2.5 moles of sodium reacting with excess chlorine gas in the following balanced equation? 2Na + Cl2 -> 2NaCl
What mass of sodium chloride is produced from 2.5 moles of sodium reacting with excess chlorine gas in the following balanced equation? 2Na + Cl2 -> 2NaCl
What mass of phosphoric acid is needed to react completely with 75 g of calcium hydroxide in the following balanced equation? 3Ca(OH)2 + 2H3PO4 -> Ca3(PO4)2 + 6H2O
What mass of phosphoric acid is needed to react completely with 75 g of calcium hydroxide in the following balanced equation? 3Ca(OH)2 + 2H3PO4 -> Ca3(PO4)2 + 6H2O
