36 g of water: 2 moles or half a mole?
36.0 g of water is 2.00 mol, and 2.00 mol of CO2 is 88.0 g. Practice reading the units to choose divide or multiply.
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2 lessons for “Mole conversions (grams ↔ moles ↔ particles)”
Why is a mole not a weight?
A dozen is 12. A mole is 6.02 x 10^23. Practice dividing particle counts by Avogadro's number, and learn why the mole is not a weight.
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Is water's molar mass 17 or 18 g/mol?
The subscript 2 in H2O is easy to miss in a molar mass. Count it once, and every conversion after stays right.
Try this lesson0.50 mol in 2.0 L: 0.25 M or 4 M?
Half a mole of salt in two liters of solution. Is the answer 0.25 M or 4 M? The definition settles it.
Try this lessonWhich coefficient becomes your ratio?
Coefficients are ratios. Three moles of O2 in the hydrogen reaction make twice as much water. Learn to read the recipe.
Try this lessonWhich reactant runs out first?
3.0 mol of O2 and 4.0 mol of H2: which runs out first? The ratio decides, not the smaller number.
Try this lessonDo molecules in a solid ever move?
You said the molecules in a solid are frozen still. They are never still: every particle vibrates, and heat changes how fast they shake.
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