A.   Chemistry, because it focuses on matter, is the foundation of all areas of science

B.   High performance in chemistry classes is a strong indicator of potential success in fields such as medicine.

C.   Training in chemistry sharpens one's ability to think quantitatively, abstractly, and nanoscopically.

D.   Chemistry, because it focuses on matter, is the foundation of all areas of science. High performance in chemistry classes is a strong indicator of potential success in fields such as medicine. Training in chemistry sharpens one's ability to think quantitatively, abstractly, and nanoscopically.

A.   Coarse screening

B.   Aeration

C.   Ozonation or chlorination

D.   Treatment with slaked lime and alum

A.   It has not been contradicted by experiments, it predicts unknown results and it summarizes a wide range of experimental results.

B.   It has not been contradicted by experiments.

C.   It summarizes a wide range of experimental results.

D.   It predicts unknown results and it summarizes a wide range of experimental results.

A.   The element chlorine boils at -34.6 °C

B.   Aluminum metal is a conductor of electricity.

C.   A chemical compound containing lead and sulfur forms shiny, plate-like, yellow crystals.

D.   A chemical compound containing cobalt and chlorine is blue.

A.   Conducts electricity well; compressible

B.   Compressible; brittle

C.   Has definite shape and volume; not compressible

D.   Good conductor of heat; takes shape of container

A.   Physical properties depend on the mass of the material being considered.

B.   The measurement of physical properties always involves a phase change.

C.   One important physical property is whether a substance is degraded by exposure to oxygen.

D.   The measurement of physical properties does not break any bonds.

A.   1.16 g/mL

B.   0.942 g/mL

C.   0.862 g/mL

D.   2.32 g/mL

A.   3.330 mL

B.   0.300 mL

C.   83.3 mL

D.   83.25 mL

A.   Acetylene, C2H2, burns in air to form carbon dioxide, CO2, and water, H2O.

B.   Dry Ice sublimes (changes directly from a solid to a gas) at -78°C.

C.   Cellulose is not soluble in water.

D.   The compound C2H6O has a density of 0.789 g/mL at 20°C.

A.   color

B.   density

C.   atomic mass

D.   flammability

E.   melting point

A.   Rubbing alcohol

B.   Clean air

C.   An asphalt (blacktop) road

D.   Sugar water

A.   F2

B.   HF

C.   H2

D.   S8

A.   A protein

B.   A sugar molecule

C.   A xenon atom

D.   A muscle cell

A.   Temperature indicates the amount of heat present in the sample whose temperature was measured.

B.   Heat flows from a body of higher temperature to one of lower temperature.

C.   Temperature can be measured in Kelvin, centigrade, or Fahrenheit degrees with equal precision.

D.   Temperature is a measure of how vigorously the particles in the sample are rotating, vibrating, or moving about.

A.   Dalton

B.   Demokritos

C.   Heisenberg

D.   Bohr

E.   Einstein

A.   Rg

B.   Mg

C.   Hg

D.   Cm

A.   Is malleable

B.   Forms alloys

C.   Conducts heat

D.   Has low density

A.   B, S, P

B.   Cl, N, O

C.   Sc, Y, La

D.   Ni, Ag, Au

A.   Cs

B.   Ca

C.   Sr

D.   Ba

A.   76 g

B.   1.6 × 10–4 g

C.   0.76 g

D.   0.16 g

E.   16 g

A.   It cross-links DNA at critical locations to prevent transcription.

B.   It prevents the collapse of microtubules.

C.   It intercalates between base pairs to stiffen the DNA strand.

D.   It suppresses the activity of telomerase.