[ CHEM1010 ] Test 1

A

How many mL are in 2.59 L

A. 2.59 x 10^3 mL

B. 2.59 x 10^-3 mL

C. 2.59 x 10^1 mL

D. 2.59 x 10^-1 mL

B

What is the SI unit for density?

A. g/mL

B. Kg/m^3

C. g/cm^3

D. Kg/cm^3

D

Which of the following elements is a transition metal?

A. Li

B. Br

C. Be

D. Ru

C

What is the basic subatomic particle with a NEUTRAL CHARGE?

A. Electron

B. Photon

C. Neutron

D. Proton

A

Which two represent isotopes?

A. a and c

B. a and b

C. c and d

D. b and d

B

What is the element in period 6, group 1B?

A. silver

B. gold

C. lanthanum

D. mercury

D

Which element is a poor conductor of heat and electricity?

A. calcium

B. chromium

C. gold

D. phosphorus

B

Which of the following are examples of a chemical change?

A. Salt is dissolved in water

B. a gas formed when two solutions are mixed

C. dry ice sublimes and produces a gas

D. ice melts to form water

C

The correct answer (reported to the proper number of significant figures) to the following is: 8.3 x 5.68 = ________

A. 47.144

B. 47.1440

C. 47

D. 47.14

B

A piece of metal weighs 8.75 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 mL to 26.47 mL. What is the density of the metal?

A. 0.597 g/mL

B. 1.68 g/mL

C. 4.44 g/mL

D. 0.370 g/mL

D

Round off 903506 to four significant figures.

A. 9000

B. 9035

C. 0091

D. 9.035 x 10^5

B

A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.31 g/mL, 1.83 g/mL, 1.93 g/mL, and 1.75 g/mL. If the actual value for the density of the sugar solution is 1.75 g/mL, which statement below best describes her results?

A. Her results are precise, but not accurate.

B. Her results are accurate, but not precise.

C. Her results are both precise and accurate.

D. Her results are neither precise nor accurate.

D

What family is the most reactive metals in the periodic table?

A. Alkaline earth metals

B. Halogens

C. Transition metals

D. Alkali metals

C

What is the name of the phase change from gas to Solid?

A. Sublimation

B. Condensation

C. Deposition

D. Vaporization

B

What is the mass percent composition of rubidium in Rb2SO4?

A. 0.03201%

B. 64.02%

C. 0.6402%

D. 32.01%