Help for grade 11 chem questions

In summary, the conversation is about a chemistry question involving calculating the mass of Tetraethyl lead and elemental lead in a certain amount of gasoline for a trip. The conversation includes a calculation for the mass of Tetraethyl lead and a suggestion to use molar masses for the mass of elemental lead. The issue of incorrect units is also mentioned.
  • #1
blazer105
2
0
Hi I have two questions grade 11 chem questions that I don't know how to do. HELP PLEASE!

Q1: Tetraethyl( Pb(C2H5)4 ) lead was added to gasoline up to 2.0ml per 3.8L of gasoline.

a)Calculate the mass of Tetraethyl lead in the total amount of gasoline that you use for this trip (31.2 L of gasoline). The density of Tetraethyl lead is 1.653g/mL

b) Calculate the mass of elemental lead in the total amount of gasoline that you will consume for this trip.


I'm not sure but here is what I did.
Mass tetraethyl lead = 31.2 L gasoline * (2.0 mL Pb(C2H5)4/3.8 L gasoline) * 1.653 g Pb(C2H5)4
 
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  • #2
Looks correct. Well, almost correct - not all units are OK. But that's a minor problem.

b is about using molar masses.
 
  • #3
Yeah thanks for the help... I got the question like 12 mins after posting thanks for your help tho.
 

1. What topics are covered in grade 11 chemistry?

Grade 11 chemistry typically covers topics such as atomic structure, chemical bonding, stoichiometry, acids and bases, solutions, and gas laws.

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