1. If .001 mol of Pb+2 (aq) is added to a solution containing .003 mol of I- (aq), a precipitate of PbI2(s) forms.
a) Write a balanced chemical reaction equation for this process.
b) How many moles of PbI2(s) are formed?
c) Which reagent is the limiting reagent
d) Which reagent is in excess? How much in excess i.e. how many moles are
left unreacted?
2. 2 g of H2 are reacted with 2 g of N2 by the reaction:
3 H2 + N2 = 2 NH3
How many grams of ammonia, NH3, are produced?
4. Match the following to the correct order
of magnitude:
i. The distance to from huntington to charleston in
mm.
ii. The weight of one atom of Cu in mg.
iii. Your weight in kg
iv. The volume of an atom in cubic meters.
v. The area of a page in your book in square km.
Answers:
a. 10-30
b. 10+8
c. 10-7
d. 10+2
e. a. 10-19