 # Chemistry Homework Help

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### Question Description  Student has agreed that all tutoring, explanations, and answers provided by the tutor will be used to help in the learning process and in accordance with Studypool's honor code & terms of service. The molar mass of CH2 is 14.0267 g/mol.
(42 g/mol) / (14.0267 g/mol) = 3 to the nearest whole number
So multiply the empirical formula by 3:
C3H6

2=

each one determine the number of moles of each atom in a given sample.

moles = mass / molar mass

10.
moles Pb = 38.43 g / 207.2 g/mol = 0.1855 mol

moles C = 17.83 g / 12.01 g/mol = 1.485 mol

moles H = 3.74 g / 1.008 g/mol = 3.710 moles

Now ratio Pb : C : H
= 0.1855 : 1.485 : 3.710

divide each number in the ratio by the smallest number
Pb : C : H
(0.1855/ 0.1855) : (1.485 / 0.1855) : (3.710 / 0.1855)
1 : 8 : 20

empirical formula
PbC8H20

Please let me know if you nea case for torture by michale levined any clarification. I'm always happy to answer your questions. qhvatchat (540)
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