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Molar Mass
- Grams per mole of a compound or molecule
- Calculated by adding up bottom number on the periodic table.
- SYMBOL: Fancy italisized M
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Grams per mole of a compound or moleculeCalculated by adding up bottom number on the periodic table. SYMBOL: Fancy italisized M
Molar Mass
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What is the molar mass of iron if .04530 moles of iron massed 2.53g?
- Molar mass equals Mass divided by number
- so 2.53/.04530 = 55.847
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How do you convert grams to moles or moles to grams
- Determine how many grams are given in the problem.
- Calculate the molar mass of the substance.
- Divide step one by step two.
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Solute
- This is what gets dissolved
- Example: salt in salt water solution
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Solvent
- This is what does the dissolving
- Example:water in saltwater solution
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What is the definition of concentration?
concentration = number / volume
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Formula for N in concentration.
CxV=N
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N in chemistry formulas
- It's the count of something
- Number of molecules
- individuals, pairs, dozens, moles
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Molarity
Concentration expressed as the number of moles of solute per liter of solution
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Calculate the number of moles of aluminum, sulfur, and oxygen atoms in 3.00 of aluminum sulfate. Al2(SO4)3
moles of = 6.00,9.00,36.0
- Multiply number of moles of individual element by the total, so in this case everything will be multiplied by 3.
- 3x2= 6 moles of AL
- 3x3=9 moles of S
- 3x12= 36 moles of O
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