moles and gases. achievement indicators determine relationships between molar quantities of gases...
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Gases and Moles The volume occupied by a certain amount of gas depends on the temperature and pressureTRANSCRIPT
Moles and Gases
Achievement Indicators Determine relationships between molar
quantities of gases at STP define STP and state the molar volume of a gas at
STP (i.e., 22.4 L/mol)
determine experimentally the molar volume of a gas at room temperature and pressure
calculate the moles or mass of a gas from a given volume at STP or vice versa
Gases and Moles The volume occupied by a certain amount of
gas depends on the temperature and pressure
Standard Temperature and Pressure (STP) Standard Temperature 0°C (273 K) Standard Pressure 101.3 KPa (1
atmosphere)
The volume of one mole of any gas @ STP is…
22.4 L
The Molar Volume @ STP is
Only For Gases at STP
Flowchart
Moles Litres at
STP
Divide by 22.4L mol
Multiply by 22.4 L mol
Calculations1. Find the volume occupied by 0.600 moles of
CO2 at STP.
0.600mol x
= 13.4 L
22.41
Lmol
Calculations2. Find the number of moles in 264.0 mL
sample of NO2 at STP.
264.0 mL x x
= 1.18 x 10-2 mol
Homework p. 83 # 11 & 12
x (1mol / ?g)
x (?g / 1mol)
x (1mol / 22.4L)
x (22.4L / 1 mol)
Volume at STP
Mass(g) 1 MOLE
Calculations Find the volume occupied by 22.0 g of CO2(g)
at STP Plan: g mol L
22.0 g CO2 x x
= 11.2 L
Now You Trya) Find the mass of a 200.0 mL sample of NO2
(g) at STP. Plan mL L mol g
200.0 mL x x x
= 0.411g
b) Find the volume occupied by 3.60 Kg of fluorine at STP.
• Kg g mol L
3.60 Kg x x x
= 2.12 x 103 L
Homeworkp. 83 #11 & 12p. 86 & 87# 22 (b & i) #24 (a,c,e,g)