a. A compound consists of 17.6% sodium (Na), 39.7% chromium (Cr), and 42.7% oxygen (O). What is the empirical formula (EF)?
b. A molecular compound consists of 54.5% C, 13.6% H and 31.8% N. The molar mass of the compound is 176g/mole. What is the empirical formula (EF) and molecular formula (MF).
Part IV Answer the following questions showing all work.
a) How many grams in 23.7 liters of chlorine gas (Cl2) @ STP?
b) How many molecules in 24.5 grams of water?
c) How many chloride ions (Cl1-) are in 14.5grams of Aluminum chloride? <b>For 2008-2009,
how many f.u. do I have if I have 14.5grams of aluminum chloride?
d) How many liters of N2 in 3.4E24 molecules of this gas.
(The element N is not found alone in nature but instead as in two's so it is actually a molecule)
Answer: Part III a. Na2(Cr2O7)1, b. {C8H24N4,C2H6N1}
Part IV a. 75.1g Cl2 @STP, b. 8.19E23 molecules H2O, c. 6.51E22 f.u. Al1Cl3, d. 130L (or 1.3E2L) N2 @STP