CHEM 103 c.
MODULE 2 EXAM 2022 c. c. c.
Question 1 c .
c. Click this link to access the Periodic Table. This may be helpful throughout the
c. c. c. c. c. c. c. c. c. c. c. c. c.
c. exam.
Show the calculation of the molecular weight for the following compounds,
c. c. c. c. c. c. c. c. c. c.
reporting your answer to 2 places after the decimal.
c. c. c. c. c. c. c. c. c.
1. Al2(CO3)3
2. C8H6NO4Cl
1. 2Al +3C + 9O = 233.99
c. c. c. c. c. c.
, 2. 8C + 6H + N + 4O + Cl = 215.59
c. c. c. c. c. c. c. c. c. c.
Question 2 c .
c. Click this link to access the Periodic Table. This may be helpful throughout the
c. c. c. c. c. c. c. c. c. c. c. c. c.
c. exam.
Show the calculation of the number of moles in the given amount of the following
c. c. c. c. c. c. c. c. c. c. c. c. c. c.
substances. Report your answerto 3 significant figures.
c. c. c. c. c. c. c.
1. 13.0 grams of (NH4)2CO3
c. c. c.
2. 16.0 grams of C8H6NO4Br
c. c. c.
1. Moles = grams / molecular weight = 13.0/ 96.09 = 0.135 mole
c. c. c. c. c. c. c. c. c. c. c. c.
2. Moles = grams / molecular weight = 16.0/ 260.04 = 0.0615 mole
c. c. c. c. c. c. c. c. c. c. c. c.
Question 3 c .
c. Click this link to access the Periodic Table. This may be helpful throughout the
c. c. c. c. c. c. c. c. c. c. c. c. c.
c. exam.
Show the calculation of the number of grams in the given amount of the following
c. c. c. c. c. c. c. c. c. c. c. c. c. c.
substances. Report your answer to 1 place after the decimal.
c. c. c. c. c. c. c. c. c. c.
1. 1.20molesof(NH4)2CO3
c. c. c.
2. 1.04molesofC8H6NO4Br
c. c. c.
1. Grams =Moles xmolecularweight =1.20 x96.09 =115.3 grams
c. c. c. c. c. c. c. c. c. c. c. c.
2. Grams =Moles xmolecularweight =1.04 x 260.04 = 270.4 grams
c. c. c. c. c. c. c. c. c. c. c. c.
Question 4 c .
c. Click this link to access the Periodic Table. This may be helpful throughout the
c. c. c. c. c. c. c. c. c. c. c. c. c.
c. exam.
MODULE 2 EXAM 2022 c. c. c.
Question 1 c .
c. Click this link to access the Periodic Table. This may be helpful throughout the
c. c. c. c. c. c. c. c. c. c. c. c. c.
c. exam.
Show the calculation of the molecular weight for the following compounds,
c. c. c. c. c. c. c. c. c. c.
reporting your answer to 2 places after the decimal.
c. c. c. c. c. c. c. c. c.
1. Al2(CO3)3
2. C8H6NO4Cl
1. 2Al +3C + 9O = 233.99
c. c. c. c. c. c.
, 2. 8C + 6H + N + 4O + Cl = 215.59
c. c. c. c. c. c. c. c. c. c.
Question 2 c .
c. Click this link to access the Periodic Table. This may be helpful throughout the
c. c. c. c. c. c. c. c. c. c. c. c. c.
c. exam.
Show the calculation of the number of moles in the given amount of the following
c. c. c. c. c. c. c. c. c. c. c. c. c. c.
substances. Report your answerto 3 significant figures.
c. c. c. c. c. c. c.
1. 13.0 grams of (NH4)2CO3
c. c. c.
2. 16.0 grams of C8H6NO4Br
c. c. c.
1. Moles = grams / molecular weight = 13.0/ 96.09 = 0.135 mole
c. c. c. c. c. c. c. c. c. c. c. c.
2. Moles = grams / molecular weight = 16.0/ 260.04 = 0.0615 mole
c. c. c. c. c. c. c. c. c. c. c. c.
Question 3 c .
c. Click this link to access the Periodic Table. This may be helpful throughout the
c. c. c. c. c. c. c. c. c. c. c. c. c.
c. exam.
Show the calculation of the number of grams in the given amount of the following
c. c. c. c. c. c. c. c. c. c. c. c. c. c.
substances. Report your answer to 1 place after the decimal.
c. c. c. c. c. c. c. c. c. c.
1. 1.20molesof(NH4)2CO3
c. c. c.
2. 1.04molesofC8H6NO4Br
c. c. c.
1. Grams =Moles xmolecularweight =1.20 x96.09 =115.3 grams
c. c. c. c. c. c. c. c. c. c. c. c.
2. Grams =Moles xmolecularweight =1.04 x 260.04 = 270.4 grams
c. c. c. c. c. c. c. c. c. c. c. c.
Question 4 c .
c. Click this link to access the Periodic Table. This may be helpful throughout the
c. c. c. c. c. c. c. c. c. c. c. c. c.
c. exam.
