21 Questions
What is the mass of one mole of iron?
56g
If the relative formula mass of nitrogen gas (N2) is 28, how many grams are in one mole of nitrogen gas?
28g
Which equation can be used to convert between moles and mass?
moles = mass ÷ relative atomic mass
If you have 42g of carbon, how many moles of carbon are present?
1 mole
What does the mass of one mole of a substance represent?
The relative formula mass of the substance
How many grams are in one mole of a substance if its relative formula mass is 16?
16g
What does (aq) mean in a chemical equation?
Aqueous
In a chemical equation, what does the relative formula mass (Mr) represent?
Sum of the relative atomic masses of the compound's atoms
What is the unit used to measure chemical amounts?
Mole
How do you balance a chemical equation if there are unequal numbers of elements on each side?
Use big numbers at the front of a compound
What does a word equation represent in chemistry?
A chemical reaction using symbols
What is the purpose of calculating relative formula masses in chemistry?
To quantify the mass of compounds
What is the molar volume of any gas at room temperature and pressure?
24 dm3
If 6 moles of a gas occupy a volume of 144 dm3, what is the volume that 9 moles of the same gas would occupy at room temperature and pressure?
216 dm3
What is the formula to calculate the concentration of a solution in grams per decimeter cubed (g/dm3)?
Concentration (g/dm3) = Mass of solute / Volume
If you have a common multiple formula of Fe2O4, what would be the empirical formula?
FeO2
What does the term 'empirical formula' represent?
The ratio of atoms in a compound in simplest whole numbers
If you have the equation 2NaOH + Mg → Mg(OH)2 + 2Na, how many moles of Na would be formed if you had 2 moles of Mg?
4 moles
What is the formula to calculate percentage yield?
(Amount of product produced / Maximum amount of product possible) x 100
In the equation Mg + 2HCl → MgCl2 + H2, how many moles of HCl are required to produce 1 mole of MgCl2?
2 moles
If a solution has a concentration of 40 g/dm3 and a volume of 0.5 dm3, what is the mass of solute in the solution?
20 g
Learn how to calculate reacting masses using experimental data and chemical equations. Understand how chemical equations can be interpreted in terms of moles. Practice calculating masses of reactants and products from balanced symbol equations.
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