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# Moles - PowerPoint PPT Presentation

Moles. The Mole. This is a unit of measurement. Moles. 1 mole = 6.02x 10 23 particles. Find amount of particles and weight. 1 mole of copper atoms= 1 mole of NaCl Formula units= 1 mole of water molecular units=. 1 mole of copper atoms= 6.02x10 23 atoms= 63.5g

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## PowerPoint Slideshow about ' Moles' - germane-craft

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### Moles

• This is a unit of measurement.

• 1 mole = 6.02x 1023 particles

Find amount of particles and weight

1 mole of copper atoms=

1 mole of NaCl Formula units=

1 mole of water molecular units=

6.02x1023 atoms= 63.5g

1 mole of NaCl Formula units=

6.02x1023 fu 58.5g

1 mole of water molecular units=

6.02x1023 mc= 18g

= 6.02x1023 particles

In a lab 0.36mol Al are needed. How many particles is that? What type of particle is this?

0.36mol X6.02x1023 particles = 2.1672 x1023

1 mol Al

2.2 x1023 atoms

How many moles of Na What type of particle is this? 2CO3 contain 7.9x1024 f. units?

How many moles of Na What type of particle is this? 2CO3 contain 7.9x1024 f. units?

7.9x1024 f.units x 1 mole

6.02x1023 f.units

13.1229 13 moles

Mole to mass problems What type of particle is this?

• What is the molar mass of these substances?

Pb

H2O 

Cu 

Al 

NaCl 

If you had 3.5 moles of Pb what is the mass What type of particle is this?

If you had 3.5 moles of Pb what is the mass What type of particle is this?

3.5 mol Pb x 207.2g Pb 725.2g

1 mol Pb

730g

If I had 125.1 g H What type of particle is this? 2O how many moles is that?

If I had 125.1 g H What type of particle is this? 2O how many moles is that?

125.1g H2O x 1mol H2O 6.950mol

18.0g H2O

6.950mol

In groups What type of particle is this?

You have 6.0 moles of oxygen gas, what is the mass?

You have 6.0 moles of Oxygen gas, what is the mass? What type of particle is this?

6.0moles O x 32.0g O 192 grams

1mol O

=200g

In groups What type of particle is this?

The mass of a sample of ammonia is 232grams. How many moles are in the sample?

The mass of a sample of ammonia is 232grams. How many moles are in the sample?

232g NH3 x 1 mol 13.647mol

17.0 g

13.6 mol

Volume are in the sample?

1 mole of any gas at STP has a volume of 22.4L

STP=Standard Temperature and Pressure

0o C and 1 atm

1 mol gas = 22.4L

If you have 3.5 mol of O are in the sample? 2 gas what is the volume?

If you have 3.5 mol of O are in the sample? 2 gas what is the volume?

3.5 mol O2 x 22.4 L O2

1 mol O2

78.4 L

78L

If a gas has a volume of 10.0L, how many moles is that? are in the sample?

10.0 L x 1 mol

22.4 L

=0.4462 mol

0.446 mol

What is the unit/ type of particle/ amount for Representative particles for each of the following:

Matter: Element Ionic cmpd Molecular cmpd

R. Part.

Type: _______ __________ ____________

Unit: _______ __________ ____________

Amount

Of Part. _______ __________ ____________

What is the unit/ type of particle/ amount for Representative particles for each of the following:

Matter: Element Ionic cmpd Molecular cmpd

R. Part.

Type: atoms formula units molecules

Unit: atoms formula units molecules

Amount

Of Part. 6.02x1023 atoms 6.02x1023 formula units 6.02x1023 molecules

SOLVE Representative particles for each of the following:

Convert 0.50 moles of ammonia vapor to liters.

How many particles are in 0.35 mol of CaCl2 (what type of particles will we have?)

Convert 0.50 moles of ammonia vapor to liters. Representative particles for each of the following:

0.50 mol x 22.4 L

1mol =11.2L = 11L

How many particles are in 0.35 mol of CaCl Representative particles for each of the following:2 (what type of particles will we have?)

0.35 mol x 6.02x1023f.units

1mol

=2.107x1023 f.units

= 2.1x1023 f.units

Mole to Mole Ratio’s Representative particles for each of the following:

Balance:

Mg + O2 MgO

N2H4 + N2O4  N2 + H2O

2 Mg + O Representative particles for each of the following:2 2 MgO

2 N2H4 + N2O4  3 N2 + 4 H2O

Coefficients represent the number of moles for each element. This gives us a ratio in the rnx.

2 Mg + O2 2 MgO

____Mg:____MgO

____Mg:____O2

____O2: ____MgO

2 Mg + O This gives us a ratio in the rnx. 2 2 MgO

__2__Mg:__2__MgO

___2_Mg:__1__O2

__1__O2: __2__MgO

2 Mg + O This gives us a ratio in the rnx. 2 2 MgO

If 3.5 moles of Mg react __(#1)___moles of O2 to produce __(#2)__ mole of MgO

#1

3.5 mol Mg x 1 mol O2 =1.75 mol O2

2 mol Mg = 1.8 mol O2

#2

3.5 mol Mg x 2 mol MgO = 3.5 mol MgO

2 mol Mg

If 3.5 moles of Mg react __1.8___moles of O This gives us a ratio in the rnx. 2 to produce _3.5___ mole of MgO

2 N This gives us a ratio in the rnx. 2H4 + N2O4  3 N2 + 4 H2O

3.75 moles of N2O4 Find the other amount of moles needed.

If 3.75 mol N2O4 rnx with ____ mol N2H4 they will produce ___ mol N2 and ___ mol H2O.

2 N This gives us a ratio in the rnx. 2H4 + N2O4  3 N2 + 4 H2O

3.75 mol N2O4 x 2 mol N2H4

1 mol N2O4 =7.50 mol N2H4

3.75 mol N2O4 x 3 mol N2

1 mol N2O4 =11.25 mol N2

=11.3 mol N2

3.75 mol N2O4 x 4 mol H2O

1 mol N2O4 =15.0 mol H2O