The Mole Concept
This term refers to the amount of substance that contains the same number of particles as there are in 12 grams of carbon-12.
What is the Mole?
This is the balanced equation for the combustion of methane (CH₄).
What is CH₄ + 2O₂ → CO₂ + 2H₂O?
To find the limiting reagent in a reaction, you need to compare this quantity between reactants.
What is the number of moles?
This is the formula used to calculate the concentration of a solution.
What is concentration = number of moles of solute / volume of solution in dm3?
This is the mass of one mole of a substance.
What is the molar mass?
To calculate the number of particles in 3 moles of a substance, you would multiply the number of moles by this number.
What is Avogadro's number (6.022 x 10²³)?
This type of chemical equation shows the relative number of moles of each reactant and product involved in the reaction.
What is a balanced equation?
This is the name of the process used to calculate the quantities of reactants and products in a chemical reaction.
What is stoichiometry?
The unit of concentration, usually used in the formula, is typically measured in these units.
What is mol/dm3?
If you have 2 moles of NaOH (molar mass = 40 g/mol), this is the mass of NaOH.
What is 80 grams?
If you have 12 grams of carbon, how many moles of carbon do you have?
What is 1 mole?
If you react 2 moles of sodium (Na) with 1 mole of chlorine gas (Cl₂), the product formed is sodium chloride (NaCl). This is an example of what type of reaction?
What is a synthesis reaction?
In the reaction 2H₂ + O₂ → 2H₂O, if you start with 4 moles of hydrogen and 2 moles of oxygen, this will be the limiting reagent.
What is oxygen?
This type of solution has the same concentration of solute particles as the solvent.
What is an isotonic solution?
In a reaction, if you start with 20 grams of NaOH (molar mass = 40 g/mol) and 10 grams of H₂SO₄ (molar mass = 98 g/mol), you can calculate the amount of this product.
What is sodium sulfate (Na₂SO₄)?
The formula to calculate the number of moles is the mass divided by this quantity.
What is the molar mass?
In the reaction 2Na + Cl₂ → 2NaCl, this is the total number of atoms involved in the reaction.
What are 6 atoms?
The ratio of the mass of a substance to the molar mass of that substance is used to calculate this.
What is the number of moles?
To prepare 0.5 moles of sodium chloride in 1 liter of solution, you would need to dissolve this amount of sodium chloride.
What is 29.2 grams of NaCl?
The molar mass of calcium carbonate (CaCO₃) is 100 g/mol. If you have 200 grams of calcium carbonate, you have this many moles of CaCO₃.
What are 2 moles?
In a reaction, if you have 2 moles of hydrogen gas reacting with 1 mole of oxygen gas, you would need this many moles of oxygen for complete combustion.
What is 1 mole?
When balancing a chemical equation, the law of conservation of mass ensures that this remains constant during the reaction.
What is the total mass?
If 4 moles of sodium react with 2 moles of chlorine, how many moles of sodium chloride (NaCl) will be produced?
What are 4 moles?
If the concentration of a solution is 2 mol/L and the volume is 0.5 L, this is the number of moles of solute in the solution.
What is 1 mole?
In the reaction between magnesium (Mg) and oxygen (O₂), 24 grams of magnesium reacts with 16 grams of oxygen. This is the mass of magnesium oxide produced.
What is 40 grams?