Avogadro's number
What is the conversion factor for avogadro's number?
1 mol / 6.022 x1023 particles
or
6.022 x1023 particles / 1 mol
What is molar mass?
the grams of a substance in moles
g/mol
True.
At STP, all gases take up the same amount space in a container
How many atoms of copper are there in the compound Cu3(PO4)2?
3 atoms of copper
How much particles are in 1 mol of Gold (Au)?
1 mol Au = 6.022 x 1023 atoms Au
Where can we find the molar mass of an element?
We can find the molar mass of a element by looking for its atomic mass in the periodic table.
example:
12.01 grams of carbon = 1 mol carbon
What is STP?
Standard temperature and pressure
What are the three methods of measurement that we discussed this unit?
count, mass, volume
How much particles are in 1 mole of Cu3(PO4)2?
1 mole Cu3(PO4)2 = 6.022 x1023 molecules Cu3(PO4)2
What is the conversion factor for molar mass?
_______ grams / 1 mol
or
1 mol / _______ grams
Does the size of a gas affect the amount of space it will take up in a container?
No because particles are so small that smaller or bigger ones still take up the same amount of space in a container.
What is the conversion factor for molar volume
1 mol / 22.4 L
or
22.4 L / 1 mol
What was avogadro's number?
a) 6020 x1023
b) 6.220 x1023c) 6.022 x1023
d) 6.023 x1023
c) 6.022 x1023
What is the molar mass of Chlorine?
35.45 g/mol
How many liters does 1 mol of H2O gas at STP take up in container
22.4 L
1 mole of any all gases at STP will take up 22.4 L of volume
What conversion factor do we need to use to solve a problem where we need to convert from moles to grams of a substance?
molar mass
1 mol / _________ grams
What did Avogadro study when he Establised the significance of 6.022 x 1023?
Gases at STP
What is the molar mass of MgBr2?
184.113 g/mol
If we decreased the temperature, the gas molecules will start slower and will cause the volume to ______________.
a) increase
b) decrease
c) stay the same
b) decrease
Since the molecules are moving slower they are not using up as much space of the container, so the volume will decrease. If the container were a balloon, the balloon will deflate.
Why are molar conversion factors useful for measuring particles in chemistry?
Particles are too small for us to individually count. But if we have grams or liters, we can convert those to moles then moles convert moles to particles.