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What is the empirical formula for perfluoropropane if the compound contains 81% fluorine and 19% carbon by mass? A) CF3 B) C2F8 C) C3F8 D) C19F81

What is the mass of 0.500 mol of dichlorodifluoromethane, CF2Cl2? A) 4.14 × 10-3g B) 60.5 g C) 121 g D) 242 g  

How many oxygen atoms are in 3.00 g of sodium dichromate, Na2Cr2O7? A) 0.0801 oxygen atoms B) 9.85 × 1020  oxygen atoms C) 6.90 × 1021  oxygen atoms D) 4.83 × 1022  oxygen atoms  

What is a m3 higher than C? ____

Which of the following has the greatest mass? A) 6.02 × 1023 molecules of O2 B) 16.0 g of O2 C) 0.500 mol of O2 D) All of the above have the same mass.

If the bottom number of a time signature is 4, what kind of note is equal to 1 beat?

In a 4/4 time signature, how many beats is a dotted eighth note worth?

 What is the molar mass of aspartic acid, C4O4H7N?

Balance the chemical equation given below, and determine the number of moles of iodine that reacts with 10.0 g of aluminum. ___ Al(s) + ___ I2(s) → ___ Al2I6(s)

If a half note is equal to 1 beat, how many beats is a dotted whole note?