Mole Practice (Mass-Mole-Particles) - Cesar Sertzen | Library

For all questions show your work!
Quiz is coming.

If you submit you will be able to check your answers.  I have only put the work in dimensional analysis because I love dimensional analysis.  It is ok if your work is using mole map. 

Our previous mole practice has included the following conversions
 g to mol
mol to g

We are now advancing our mole practice to include the following conversions 
L to mol
mol to L
# of particles(atoms or molecules) to mol
mol to # of particles

And triple play conversions
g to mol to # of particles

For those of you that are dimensional analysis converts, like me, here are the following conversion factors that you will need:

1 mole of a molecule  = 6.02 x 1023 molecules 
for example  1 mole of H2O = 6.02 x 10 23 molecules of H2O

1 mole of gas = 22.4L of that gas
for example 1 mol of O2  = 22.4L O2

the gas conversion only works at STP, standard temperature and pressure, 0°C and 1 atm.  When we cover gases we will talk more about this.  For the next quiz all gases will be at standard temperature and pressure

For those of you that are mole map users, everything you need is already there.

This HW practice starts has both double plays and triple plays, that means you may do one or two steps of the "mole map" or you may be using one or two conversion factors in the dimensional analysis.

1

How many molecules are in one mole of water?

1

How many molecules are in 88 moles of water?

1

How many molecules of water are in 777.7 grams of water?

1

How many liters of H2O gas, at STP, will be occupied by 1 mole?

1

How many liters of H2O gas, at STP, will be occupied by 10 moles?

1

How many liters of H2O gas, at STP, will be occupied by 1000 grams?

1

How many molecules of H2O gas are there in a 2L soda bottle that has been emptied and filled with gaseous water at STP?

1

The writing part of a pencil is graphite. Research online the chemical formula for graphite. At a pencil factory you determine that you need 1000 moles of graphite to keep up with your production schedule. Unfortunately the graphite supplier only takes orders in grams. How many grams of graphite should you order?

1

When you receive the graphite order, you only receive 10,000 grams of graphite. You are extremely dissapointed with the supplier and are worried about meeting your production quotas for pencils. How many moles of graphite did the supplier send to you?

1

For your birthday you need to fill up some balloons with helium gas. The helium store charges you for 150 L of helium gas at standard temperature and pressure. That seems like too much helium gas! Quickly you pull out your calculator and determine the number of moles of helium gas.

1

Your favorite breakfast cereal, frosted flakes, has about 0.010g of iron per serving. Iron is good for you but you want to make sure you aren't eating too many atoms of iron for breakfast. You decide to calculate how many atoms of iron are in one serving of your breakfast cereal. How many atoms of iron are you eating for breakfast? Is it too many?

1

You are hungry for breakfast but don't have any more Frosted Flakes, instead you decide eating refined table sugar, sucrose, can provide enough nutritional value for you to survive until lunch time. If you wanted to consume 1,000,000 molecules of sucrose, how many grams of sucrose would you need to consume. The chemical formula for sucrose is C12H22O11 and the molar mass is 342.2965 g / mol.

Hint: The answer is not even one gram, it is a very very very very very very very very very very very very very small number.