SUMQ

If a chemical reaction involving substances A and B stops when B is completely used up then B is referred to as the ______.

• EXCESS REACTANT

• LIMITING REACTANT

• PRIMARY REACTANT

• THEORETICAL REACTANT

Carbon dioxide fire extinguishers were developed to fight fires where using water would be hazardous. What effect does the carbon dioxide have on fire?

• CHANGES THE MOLE RATIO OF THE REACTANTS.

• INCREASES THE POTENTIAL YIELD OF THE REACTION

• DECREASES THE POTENTIAL YIELD OF THE REACTION

• SLOWS THE REACTION BY LIMITING THE REACTANT OXYGEN

What volume will make one mole of any gas at an STP?

• 1.0 L

• 14.2 L

• 22.4 L

• 24.1L

The pressure of a gaseous component is related to the total pressure of the mixture by its ______.

• MOLE FRACTION

• MOLARITY

• PARTIAL PRESSURE

• PERCENT BY MASS

One amu is equal to_____.

• 1.602 X 10-19 g

• 1.661 X 10 -24 g

• 6.022 X 10 23 g

• 6.626 X 10 -24 g

Of these reaction types, which has only one reactant?

• DECOMPOSITION

• DISPLACEMENT

• OXIDATION

• SYNTHESIS

Which of the following is not true about the isotopic symbol 62 Cu 29?

• THE ISOTOPE HAS A MASS NUMBER OF 64

• THE ISOTOPE HAS 35 ELECTRONS

• THE ISOTOPE HAS 35 NEUTRONS

• THE ISOTOPES HAS 29 PROTONS

A 10.0 g water sample decomposes into 1:1 gram of H2 and 8.89 grams of O2. Which law supports this?

• LAW OF CONSERVATION OF MASS

• LAW OF CONSTANT COMPOSITION

• LAW OF DEFINITE PROPORTIONS

• LAW OF MULTIPLE PROPORTIONS

Which of the following best completes the analogy? Air: mixture;______:______.

• ATOMS:ELEMENT

• ELEMENT;COMPOUND

• OXYGEN:ELEMENT

• SOLVENT: SOLUTION

A mixture differ from a compound in that a compound_______.

• CONTAINS ONLY ONE ELEMENT

• HAS DEFINITE COMPOSITION. (BY MASS)

• CAN BE CLASSIFIED AS EITHER HOMOGENOUS OR HETEROGENOUS.

• VARIES IN CHEMICAL COMPOSITION DEPENDING ON THE SAMPLE SIZE