CHEM 103 GENERAL CHEMISTRY I PORTAGE
LEARNING MODULE 3 2026 PRACTICE TEST
QUESTIONS WITH EXEMPLAR ANSWERS
◉ Density Calculation. Answer: D (g/ml) = M(g) / V(ml)
◉ Significant Figures Rules. Answer: All non-zero digits are
significant. Zeros between or following non-zero numbers are
significant. Zeros to the left of a decimal are not significant.
◉ Significant Figures in Calculations. Answer: In
addition/subtraction, round to fewest decimal places. In
multiplication/division, round to fewest significant figures.
◉ Rounding Off Numbers. Answer: If digit to drop > 5, increase last
retained digit by 1. If digit to drop < 5, keep last remaining digit. If
digit to drop = 5, round based on following digit.
◉ Significant Figures Count. Answer: 1.) 0.004035: 4 sig figs 2.)
306.2: 4 sig figs 3.) 20.70: 4 sig figs 4.) 0.3450: 4 sig figs 5.) 0.0231: 3
sig figs 6.) 45.670: 5 sig figs 7.) 0.00034: 2 sig figs
◉ (5.625 + 8.15) x 2.34 + 3.2 =. Answer: 35.4 (to tenths place)
,◉ 7..390 + 1.53 - 2.810 =. Answer: 1.87 (to hundredths place)
◉ (12.5340 - 8.350) / 4.76 + 8.35 =. Answer: 9.23 (to hundredths
place)
◉ Average of 0.1707, 0.1713, 0.1720, 0.1704, 0.1715 =. Answer:
0.1712
◉ 5.) Calculate Volume. Answer: 73.5 ml (3 sig figs)
◉ 6.) Calculate Density. Answer: 3.1 g/ml (2 sig figs)
◉ Element Symbol: ALUMINUM. Answer: Al
◉ Element Symbol: ANTIMONY. Answer: Sb
◉ Element Symbol: ARGON. Answer: Ar
◉ Element Symbol: ARSENIC. Answer: As
◉ Element Symbol: BARIUM. Answer: Ba
, ◉ Element Symbol: BERYLLIUM. Answer: Be
◉ Element Symbol: BISMUTH. Answer: Bi
◉ Element Symbol: BORON. Answer: B
◉ Bromine. Answer: Symbol: Br
◉ Cadmium. Answer: Symbol: Cd
◉ Calcium. Answer: Symbol: Ca
◉ Carbon. Answer: Symbol: C
◉ Chlorine. Answer: Symbol: Cl
◉ Chromium. Answer: Symbol: Cr
◉ Cobalt. Answer: Symbol: Co
◉ Copper. Answer: Symbol: Cu
LEARNING MODULE 3 2026 PRACTICE TEST
QUESTIONS WITH EXEMPLAR ANSWERS
◉ Density Calculation. Answer: D (g/ml) = M(g) / V(ml)
◉ Significant Figures Rules. Answer: All non-zero digits are
significant. Zeros between or following non-zero numbers are
significant. Zeros to the left of a decimal are not significant.
◉ Significant Figures in Calculations. Answer: In
addition/subtraction, round to fewest decimal places. In
multiplication/division, round to fewest significant figures.
◉ Rounding Off Numbers. Answer: If digit to drop > 5, increase last
retained digit by 1. If digit to drop < 5, keep last remaining digit. If
digit to drop = 5, round based on following digit.
◉ Significant Figures Count. Answer: 1.) 0.004035: 4 sig figs 2.)
306.2: 4 sig figs 3.) 20.70: 4 sig figs 4.) 0.3450: 4 sig figs 5.) 0.0231: 3
sig figs 6.) 45.670: 5 sig figs 7.) 0.00034: 2 sig figs
◉ (5.625 + 8.15) x 2.34 + 3.2 =. Answer: 35.4 (to tenths place)
,◉ 7..390 + 1.53 - 2.810 =. Answer: 1.87 (to hundredths place)
◉ (12.5340 - 8.350) / 4.76 + 8.35 =. Answer: 9.23 (to hundredths
place)
◉ Average of 0.1707, 0.1713, 0.1720, 0.1704, 0.1715 =. Answer:
0.1712
◉ 5.) Calculate Volume. Answer: 73.5 ml (3 sig figs)
◉ 6.) Calculate Density. Answer: 3.1 g/ml (2 sig figs)
◉ Element Symbol: ALUMINUM. Answer: Al
◉ Element Symbol: ANTIMONY. Answer: Sb
◉ Element Symbol: ARGON. Answer: Ar
◉ Element Symbol: ARSENIC. Answer: As
◉ Element Symbol: BARIUM. Answer: Ba
, ◉ Element Symbol: BERYLLIUM. Answer: Be
◉ Element Symbol: BISMUTH. Answer: Bi
◉ Element Symbol: BORON. Answer: B
◉ Bromine. Answer: Symbol: Br
◉ Cadmium. Answer: Symbol: Cd
◉ Calcium. Answer: Symbol: Ca
◉ Carbon. Answer: Symbol: C
◉ Chlorine. Answer: Symbol: Cl
◉ Chromium. Answer: Symbol: Cr
◉ Cobalt. Answer: Symbol: Co
◉ Copper. Answer: Symbol: Cu
