1) Determine the empirical formula of a compound that is 85.63 percent C and 14.

Question

1) Determine the empirical formula of a compound that is 85.63 percent C and 14.37 percent H by mass.

2) Fermentation is a complex chemical process of wine making in which glucose is converted into ethanol and carbon dioxide

                                 C6H12O6----> 2C2H5OH+2CO2

Starting with 759.1g of glucose, what is the maximum amount of ethanol in grams and in liters that can be obtained by this process (density of ethanol= 0.789g/mL)?

g=?

L=?

3) Potassium is the second most abundant metal in the human body. calculate the followiing:

(a) the number of atoms in 6.73 moles of potassium. (scientific notation)

(b) the number if moles of potassium that contains 8.37*10^25 atoms. (scientific notation).

4) Calculate the number of oxygen molecules and the number of oxyden atoms in 42.9g of O2.

(a) oxygen molecules= (scientific notation)

oxygen atoms= (scientific notation).

(b) Calculate the mass of 9.39*10^14 SO3 molecules. (scientific notation).

Explanation / Answer

1) CH_2

2) 194 g of ethanol or .246 L

3a) 4.05*10^24 atoms

3b) 139 mol

4a) 8.07*10^23 oxygen molecules or 1.61*10^24 oxygen atoms

4b) 1.25*10^-7 g

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