Jeopardy 10/20/23

Questions About Moles

100

What is Avogadro's Number?

6.022x10²³

200

If I want to go to grams to moles what conversion factor would be most useful?

Molar Mass

300

If I want to go from molecules, atoms, and number of items to moles, what conversion factor will be most useful?

Avogadro's Number

400

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

500

What series of conversion factors would help me if I wanted to go from molecules to mass?

Avogadro's Number then Molar Mass

Polyatomic Ions

100

SO₃^2-

 Sulfite

200

Na(NO₃)

Sodium Nitrate

300

Ca(Cr₂O₇)

Calcium Dichromate

400

K(SCN)

Potassium Thiocyanate

500

Mg(SO₄)

Magnesium Sulfate

Elements

100

Pb

Lead

200

Ag

Silver

300

Hg

Mercury

400

Sr

Strontium

500

Rb

Rubidium

Common Facts

100

What is molar mass of of water?

18g/mol

200

What atoms want a duet?

Hydrogen and Helium

300

What is the most electronegative element?

Fluorine

400

What elements bonded to a hydrogen can allow hydrogen bonding?

N,O,F (Nitrogen, Oxygen, Fluorine)

500

How do stronger IMF's affect boiling point?

They cause the boiling point to raise

Sig Fig Rules

100

How many sig figs does 100 have?

1

200

How many sig figs does 100. have?

3

300

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. 

400

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.

500

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.