# Mole conversions

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Mole conversions. QOD: Show a numerical set-up for calculating the answer to this problem. How many grams are present in 2 mol of NaNO 3 ?. Remember from yesterday…. Conversions in chemistry. Use a conversion factor that equals 1 (because we can always multiply anything that equals 1!) - PowerPoint PPT Presentation

### Text of Mole conversions

• Mole conversionsQOD: Show a numerical set-up for calculating the answer to this problem.

How many grams are present in 2 mol of NaNO3?

• Conversions in chemistryUse a conversion factor that equals 1 (because we can always multiply anything that equals 1!)

When do you divide by the gram-formula mass? When do you multiply?

Remember from yesterday

• When you want moles? Mol = grams x 1 molGram-formula massReview from yesterday

• When you want grams? Grams = mol xGram-formula mass1 mole

• What is the mass of 4.5 mol of KOH?

• How many grams of oxygen present in 9.0 mol of KOH?

• Activity: Mole conversionsWork with your group-mates to finish the practice we started yesterday. If you finish early, start your HW!

• If you want the moles, and you have the mass, you gotta *clap* divide by the gram-formula mass

• Which table group can sing it best?Volume counts!

Accuracy counts!

Group participation counts!

Prize: extra-credit point on Fridays quiz

Contest:

• If you want the moles, and you have the mass, you gotta *clap* divide by the gram-formula mass

• Ms. B-Law is collecting: HW #5 8, last weeks QODAnnouncement: Quiz #2 Moles! tomorrow

• Closing:Think: how would you set-up this problem numerically?

What is the mass of 2.8 mol of water?

Recommended ##### Stoichiometry pg. 81. Mole to mass start with given use mole to mole conversions to get to moles use molar mass to convert to mass Determine the mass
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