1A. Give the empirical formula of each of the following compounds if a sample co

Question

1A. Give the empirical formula of each of the following compounds if a sample contains the following quantities of each element. (Type your answer using the format CO2 for CO2.)

(a) 0.0195 mol C, 0.039 mol H, and 0.013 mol O


(b) 11.71 g C, 2.62 g H, and 5.20 g O


(c) 63.7% nitrogen and 36.3% oxygen by mass

1B.The complete combustion of octane, C8H18, a component of gasoline, proceeds as is shown below.

(a) How many moles of O2 are needed to burn 2.45 mol of C8H18?
_____ mol


(b) How many grams of O2 are needed to burn 2.80 g of C8H18?
_____ g

(c) Octane has a density of 0.692 g/mL at 20°C. How many grams of O2 are required to burn 7.60 gal. of C8H18? 1 gal = 3.79 L.
_____ g

Explanation / Answer

1A. Give the empirical formula of each of the following compounds if a sample co

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