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3 cards from this section. Quick, good the night before a test.
What is the molar mass of oxygen (O)?
Check the periodic table for the atomic mass.
How many grams are in one mole of carbon (C)?
Refer to the atomic weight of carbon.
What is the definition of molar mass?
Think about how we measure amounts of substances in chemistry.
The molar mass of H₂ is 2 g/mol.
Consider the molecular formula and how to calculate it.
A sample contains 24 grams of carbon dioxide (CO₂). Calculate the number of moles in the sample.
Use the formula: moles = mass / molar mass.
If 7.5 grams of sodium (Na) are added to 300 mL of water, what is the molarity of the sodium in solution?
Convert grams to moles, then divide by volume in liters.
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