Acompound containing only c, h, and o, was extracted from the bark of the sassafras tree. the combustion of 43.5 mg produced 118 mg of co2 and 24.2 mg of h2o. the molar mass of the compound was 162 g/mol. determine its empirical and molecular formulas.

% C = (12/44) x (118/43.5) x 100 = 74 %
% H = (2/18) x (24.2/43.5) x 100 = 6.18 %
% O = 100 - (74 + 6.2) = 19.82 %
Divide % of elements by atomic masses:
C = (74/12) = 6.17 ; H = (6.18/1) = 6.18 ; O = (19.82/16) = 1.24
Divide by the smallest (1.24)
C : H : O = 5 : 5 : 1
The empirical formula is C₅H₅O; it is mass = 81 g [(12 x 5) + (1 x 5) + (16 x 1)] 
Molecular formula mass = 162 
n = 162 / 81 = 2
Molecular formula (C₅H₅O)₂ = C₁₀H₁₀O₂

Organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"