No grade for this. However you should keep a pencil and paper nearby to record topics that you will need help with. Plan to ask those questions between now and the exam.
Propane burns in air according to the following equation:
C3H8 + 5 O2 yields 3 CO2 + 4 H2O
How many moles of carbon dioxide are produced, if the reaction consumes 12 moles of oxygen?
The following symbols suggest a decomposition reaction:
AZ yields A + Z
AZ + B yields BZ + A
AZ + BY yields AY + BZ
A + B Yields AB
The following symbols suggest a synthesis reaction:
AZ yields A + Z
AZ + B yields BZ + A
AZ + BY yields AY + BZ
A + B Yields AB
The following symbols suggest a double replacement (displacement) reaction:
AZ yields A + Z
AZ + B yields BZ + A
AZ + BY yields AY + BZ
A + B Yields AB
The following symbols suggest a single replacement (displacement) reaction:
AZ yields A + Z
AZ + B yields BZ + A
AZ + BY yields AY + BZ
A + B Yields AB
142 grams of chlorine is prepared. How many chlorine molecules are present? (Express with 3 significant digits -- include a number in the form: n.nn e nn where "e" signals 10 to a power and do not include units)
142 grams of chlorine is prepared. How many chlorine atoms are present? (Express with 3 significant digits -- include a number in the form: n.nn e nn where "e" signals 10 to a power and do not include units)
What percent by mass C is C2H6O? Round molar masses to whole numbers. Report answer to 2 S.F. followed by space and % sign.
What percent by mass H is C2H6O? Round molar masses to whole numbers. Report answer to 2 S.F. followed by space and % sign.
What percent by mass O is C2H6O? Round molar masses to whole numbers. Report answer to 2 S.F. followed by space and % sign.
What's the molecular formula where the compound is 52% C, 35% O and 13 % H and a molecular mass of 92 g / mol. What's the molecular formula?