You have x moles of al2(so4)3. express each of the following quantities in terms of x. a) the number of moles of aluminum ions b) the number of moles of sulfate ions c) the number of moles of oxygen atoms d) the number of grams of al2(so4)3 e) the number of grams of oxygen

- (a) 2X mol, (b) 3X mol, (c) 12X mol, (d) 342.15X g and (e) 96X g

Solution:- (a) The dissociation equation for the given compound is written as:

From this equation, there is 1:2 ratio between the aluminium sulfate and aluminum ion. So, the number of moles of Al ion in the X moles of the compound would be:

= 2X moles of Al ion

So, there would be 2X moles of Al ions in the X moles of the compound.

(b) From the equation, there is 1:3 mol ratio between aluminum sulfate and sulfate ion. So, the number of moles of sulfate ion in the X moles of the compound would be:

=

So, there would be 3X moles of the sulfate ion in X moles of the compound.

(c) There are 12 moles of O atom in 1 mol of the compound. So, moles of O atom in X moles of compound would be:

= 12X moles of O atom

So, there would be 12X moles of O atom in X moles of the compound.

(d) Molar mass of aluminum sulfate is 342.15 gram per mol. It means the mass of 1 mol of the compound is 342.15 g. So, the mass of X moles of the compound would be:

= 342.15X g of

So, there are 342.15X g of aluminium sulfate in X moles of it.

(e) From part c, there are 12X moles of O in X moles of the compound and the atomic mass of O is 8. So, the grams of O would be:

= 96X g of O

So, the mass of O in the X moles of the compound would be 96X g.

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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explanation: