NOTES: Gases, Molar Volume, & Stoichiometry – a REVIEW!

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Aim: How to convert from moles to volume and vice versa

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Presentation transcript:

NOTES: Gases, Molar Volume, & Stoichiometry – a REVIEW!

Avogadro’s Hypothesis: ● equal volumes of gases at the same temperature and pressure contain equal #’s of particles; ● at STP, 1 mol (6.02 x ) of particles of any gas occupies a volume of 22.4 L.

Example #1: What volume does mol of argon gas occupy at STP?

Example #1: What volume does mol of argon gas occupy at STP?

Example #1: What volume does mol of argon gas occupy at STP? = 16.6 L

Example #2: How many oxygen molecules are in 3.36 L of oxygen gas at STP?

Example #2: How many oxygen molecules are in 3.36 L of oxygen gas at STP?

Example #2: How many oxygen molecules are in 3.36 L of oxygen gas at STP? = 9.03 x molecules

Example #3: Determine the volume (in L) occupied by 12.6 g of nitrogen gas, N 2, at STP.

Example #3: Determine the volume (in L) occupied by 12.6 g of nitrogen gas, N 2, at STP.

Example #3: Determine the volume (in L) occupied by 12.6 g of nitrogen gas, N 2, at STP. = 10.0 L N 2

Stoichiometry Example #1: Li 3 N (g) + 3H 2 O (l)  NH 3(g) + 3LiOH (aq) What mass of water is needed to react with 29.3 L of Li 3 N?

Stoichiometry Example #1: Li 3 N (g) + 3H 2 O (l)  NH 3(g) + 3LiOH (aq) What mass of water is needed to react with 29.3 L of Li 3 N?

Stoichiometry Example #1: Li 3 N (g) + 3H 2 O (l)  NH 3(g) + 3LiOH (aq) What mass of water is needed to react with 29.3 L of Li 3 N? = 70.6 g H 2 O

Stoichiometry Example #2: Li 3 N (g) + 3H 2 O (l)  NH 3(g) + 3LiOH (aq) When 13.3 L of NH 3 are produced how many formula units of LiOH are produced?

Stoichiometry Example #2: Li 3 N (g) + 3H 2 O (l)  NH 3(g) + 3LiOH (aq) When 13.3 L of NH 3 are produced how many formula units of LiOH are produced?

Stoichiometry Example #2: Li 3 N (g) + 3H 2 O (l)  NH 3(g) + 3LiOH (aq) When 13.3 L of NH 3 are produced how many formula units of LiOH are produced? = 1.07 x formula units LiOH

Stoichiometry Example #3: Li 3 N (g) + 3H 2 O (l)  NH 3(g) + 3LiOH (aq) Given grams of LiOH produced, what volume (L) of Li 3 N was used?

Stoichiometry Example #3: Li 3 N (g) + 3H 2 O (l)  NH 3(g) + 3LiOH (aq) Given grams of LiOH produced, what volume (L) of Li 3 N was used?

Stoichiometry Example #3: Li 3 N (g) + 3H 2 O (l)  NH 3(g) + 3LiOH (aq) Given grams of LiOH produced, what volume (L) of Li 3 N was used? = 35.1 L Li 3 N