Review Homework For 2nd Section Of Mole Concept And Compounds

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Part I Please write the appropriate chemical formula or chemical name for the following. Make sure to give symbols & charges of each ion before writing correct chemical formula.

a) Trichlorine octabromide

b) Fe₂(H₁P₁O₃)₃

c) Ammonium carbonate

d) Silicon monophosphide

e) O₁Br₅

f) Cobalt (III) sulfate

g) Cu₁(C₂O₄)₁

h) Silver nitrate

i) Zn₃(P₁O₄)₂

j) N₂Cl₂

Part II Show the symbol and charge for each ion, correct chemical formula and LDS for the following Ionic Compound

a. Potassium sulfide

b. Aluminum chloride

c. Calcium phosphide

Part III Answer the following question showing all work

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 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