CP Chapter 10 Notes Part 1 – The Mole
What is a mole?
A ______________, commonly abbreviated ______________ is the SI unit used to measure the amount of a substance.
The amount in a mole is ________________________. This amount is also known as ____________________ number.
1 mol = ______________________________________
The number of _______________ is for an _________________.
The number of _________________ ____________ is for an ________________ compound.
The number of _________________________ is for a compound that is ___________________ bonded.
Moles to particles
1) Determine the number of atoms in 3.50 mol of aluminum (Al).
2) Given 4.25 mol of sodium chloride (NaCl), determine the number of formula units.
3) Calculate the number of molecules in 12.6 mol of sulfur dioxide (SO2.)
Particles to moles
4) How many moles are in 6.75 x 1024 atoms of nickel (Ni)?
5) How many moles are in 1.25 x 1024 molecules of carbon dioxide (CO2)?
6) How many moles are in 6.78 x 1023 formula units of magnesium chloride (MgCl2)?
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Molar Mass
Definition of Molar Mass: _______________________________________________________________________
Atomic mass, has the units ___ ___ ___ and is the color _____________ on the periodic table.
The RED numbers are also the molar ___________. It’s units are ___.
Element Molar Mass
7) Molar mass of carbon (C) = ____________g
8) What would the molar mass of boron (B) be? __________
Compound Molar Mass- add up all of the element molar masses
What is the molar mass of:
9) sodium hydroxide (NaOH)?
10) potassium chromate (K2CrO4)?
11) magnesium phosphate (Mg3(PO4)2)?
Moles to mass
12) Calculate the mass in grams of 0.0450 moles of chromium (Cr).
13) Calculate the mass in grams of 3.05 moles of manganese (Mn).
14) What is the mass of 2.50 moles of CH4?
15) What is the mass of 4.35 moles of H2SO4?
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Mass to moles
16) Determine the number of moles in 35.5 g of silver (Ag).
17) Determine the number of moles in 225 g of zinc (Zn).
18) Calculate the number of moles of 325 g of Ca(OH)2.
19) Calculate the number of moles of 321 g of PbCl2.
Mass to atoms
20) How many atoms are in 63.2 g of beryllium (Be)?
21) How many atoms are in 124 g of mercury(II) chloride (HgCl2)?
Atoms to mass
22) What is the mass in grams in 3.15 x 1024 atoms of silver (Ag)?
23) What is the mass in grams in 1.50 x 1015 molecules of sulfur dioxide (SO2)?
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Mole relationship form a chemical formula
24) Determine the number of moles of chloride ions of AlCl3.
25) How many moles of oxygen atoms are present in 3.50 moles of SO3?
Mass to Moles to Particles
26) How many molecules make up 37.5 grams of SO3?
27) A sample of aluminum chloride (AlCl3) has a mass of 35.6 g.
a. How many aluminum ions are present?
b. How many chloride ions are present?
c.
What is the mass in grams of one formula unit of aluminum chloride (AlCl3)?
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