Chemistry SOL 2003 (Complete)

For an experiment, 9.7 mL of HCl are needed. What is the best instrument to use for measuring this volume?

• Beaker

• Erlenmeyer flask

• Graduated cylinder

• Test tube

A student used the above ruler to measure the length of a nail. The length of this nail, according to the precision of the ruler, is —

• 3.5 cm

• 3.55 cm

• 3.7 cm

• 3.75 cm

The coefficients of the correctly balanced equation for the reaction illustrated above are —

• 1, 1, 1

• 1, 1, 2

• 2, 1, 2

• 2, 2, 1

Elements from which two groups in the periodic table would most likely combine with each other to form an ionic compound?

• 1 and 2

• 16 and 17

• 1 and 17

• 17 and 18

The diagram above is a potential energy curve for a reaction. Which number represents the effect of a catalyst on the reaction?

• 1

• 2

• 3

• 4

An ice-skating rink has tubes under its floor to freeze the water. Salt water is cooled well below the freezing point of water and pumped through the tubes to freeze the water in the rink. Why can the salt water be cooled so low without freezing?

• Salt has a very low freezing point.

• Adding salt to water lowers its freezing point.

• Movement of the salt water through the tubes keeps it in the liquid state.

• The salt water is constantly absorbing energy from its surroundings.

Which of the following describes what takes place when iron (Fe⁰) is oxidized to Fe²⁺ ions?

• A gain of two electrons

• A loss of two electrons

• A gain of two protons

• A loss of two protons

In chemical compounds, covalent bonds form when —

• the electronegativity difference between two atoms is very large

• electrons are completely transferred between two metals

• pairs of electrons are shared between two nonmetal atoms

• two nonmetal ions are attracted to each other by opposite charges

Which scientist was the first to conclude through experimentation that atoms have positive charges in their nuclei?

• Bohr

• Dalton

• Mosley

• Rutherford

Soda water is a solution of carbon dioxide in water. This solution is composed of a —

• gaseous solute in a gaseous solvent

• liquid solute in a liquid solvent

• gaseous solute in a liquid solvent

• liquid solute in a gaseous solvent