Questions About Moles
What is Avogadro's Number?
6.022x1023
SO32-
Sulfite
Pb
Lead
What is molar mass of of water?
18g/mol
How many sig figs does 100 have?
1
If I want to go to grams to moles what conversion factor would be most useful?
Molar Mass
Na(NO3)
Sodium Nitrate
Ag
Silver
What atoms want a duet?
Hydrogen and Helium
How many sig figs does 100. have?
3
If I want to go from molecules, atoms, and number of items to moles, what conversion factor will be most useful?
Avogadro's Number
Ca(Cr2O7)
Calcium Dichromate
Hg
Mercury
What is the most electronegative element?
Fluorine
When multiplying two numbers how do I know how many sig figs the final answer has?
You match the number with the least sig figs.
What would the conversion factor be if I want to find the number of iron atoms in a molecule of Fe2O3?
2 Fe Atoms/1 Molecule of Fe2O3 or
1 Molecule of Fe2O3/2 Fe Atoms
K(SCN)
Potassium Thiocyanate
Sr
Strontium
What elements bonded to a hydrogen can allow hydrogen bonding?
N,O,F (Nitrogen, Oxygen, Fluorine)
When adding or subtracting two numbers how do you determine the number of sig figs?
The answer should be rounded to the same number of decimal places as the number with the least number of decimal places.
What series of conversion factors would help me if I wanted to go from molecules to mass?
Avogadro's Number then Molar Mass
Mg(SO4)
Magnesium Sulfate
Rb
Rubidium
How do stronger IMF's affect boiling point?
They cause the boiling point to raise
When using a conversion factor such as Kg to g or Avogadro's number, do you have to take the conversion factor into account when determining your sig figs, and why or why not?
No you do not have to consider the sig figs of your conversion factors, because sig figs only apply to measured values. Because a conversion factor is exact, you do not need to consider the sig figs of the conversion factors.