Mole Concept and Avogadro Constant
Chemistry ⇒ Stoichiometry and Chemical Calculations
Mole Concept and Avogadro Constant starts at 9 and continues till grade 12.
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A sample contains 0.1 moles of CaCO3. How many formula units are present?
A sample contains 0.75 moles of SO2. How many molecules are present?
A sample contains 3.01 × 1023 molecules of H2SO4. How many moles of H2SO4 are present?
A sample contains 4.5 g of H2O. How many moles of water are present? (Molar mass = 18 g/mol)
A sample of a compound contains 1.204 × 1024 molecules. How many moles does this represent?
A sample of nitrogen gas (N2) contains 1.5 moles. How many molecules are present?
A student has 0.1 moles of glucose (C6H12O6). How many molecules of glucose does this represent?
Avogadro’s constant is used to relate which two quantities?
Calculate the mass of 0.25 moles of NaCl (Molar mass = 58.5 g/mol).
Calculate the number of atoms in 2 moles of magnesium (Mg).
Calculate the number of chloride ions in 0.5 moles of NaCl.
Calculate the number of molecules in 0.5 moles of oxygen gas (O2).
Calculate the number of moles in 12 g of helium (He). (Molar mass = 4 g/mol)
Calculate the number of oxygen atoms in 2 moles of H2O.
Explain why the mole is a useful unit in chemistry.
How many atoms are present in 0.25 moles of aluminum (Al)?
How many moles are present in 1.204 × 1024 molecules of CO2?
How many moles are present in 22 g of CO2? (Molar mass of CO2 = 44 g/mol)
If 0.2 moles of a gas occupy 4.48 dm3 at STP, what is the molar volume of the gas at STP?
If you have 3 moles of NaCl, how many formula units do you have?
