Loading the lesson
Loading the lesson
Search AllRounder.ai
Search the courses, subjects, tracks, games and features, or jump straight to a page.
Search the courses, subjects, tracks, games and features, or jump straight to a page.
3 cards from this section. Quick, good the night before a test.
Calculate the number of moles in 20.0 g of potassium (K). (Molar mass = 39.10 g/mol)
Use the formula: moles = mass ÷ molar mass.
How many grams are in 3.5 moles of carbon dioxide (CO₂)? (Molar mass = 44.01 g/mol)
Apply mass = moles × molar mass.
What is the molar mass of water (H₂O)?
Remember to sum the masses of all atoms in the molecule.
True or False: Avogadro's number is 6.02214076 × 10²³.
Think about how Avogadro's number relates to counting molecules in a mole.
You have a sample of nitrogen gas (N₂) weighing 30.0 g. Calculate the number of moles and molecules present.
Use the molar mass for conversion and Avogadro’s number to find the number of molecules.
You have 2.00 moles of sodium chloride (NaCl). Calculate the total mass and the number of formula units.
Find the molar mass first, then use it to find total mass and apply Avogadro's number for the unit calculation.
5 more questions in this section. Enroll free to practise them all.
Enroll free