273 K is equal to ___ ^oC

0^oC

T/F

Isotopes are substances that have same atomic number and the same mass number.

Faulse

T/F

Sulfur (atomic nubmer = 16) has more valence electrons than Oxygen (atomic number =8)

F

T/F

A sulfur (S) atom has a smaller radius than a seleium (Se) atom

True

T/F

The nucleus of an atom has a neutral charge

F

T/F

The answer to 5.501 / 16.0 should contain three significant digits.

True

T/F

Magnesium has a larger first ionization energy than

calcium.

True

T/F

There are 4 neutrons in ⁷Li

True

T/F

All alkali metals have 1 electron in their outermost s-orbital

True

What is a good represent of a pure substance?

Sugar

1m = ? mm

1000

T/F

Two elements of high electronegativity combine.  The bond between them will be covaent.

True

T/F

A compound formed from calcium and carbon is expected to be an ionic compound

True

M + NM

T/F

Sulfur has a greater electronegativity than phosphorus.

True

T/F

Sulfur has a greater electronegativity than Oxygen.

F

T/F

Carbon dioxide is a polar molecule

F

T/F

The mass of one mole of calcium carbonate is greater than one mole of poassium carbonate

F

T/F

A mole of CO₂ contains the same number of oxygen atoms as a mole of CaCO₃

F

T/F

When 2.0 mole of nitrogen is reacted, according to the following reaction, the theoretical yield of hydrogen is 7.0 moles.

F

2 mol N      14.01g

T/F

The hydrogen oxygen bond in water is expected to be polar.

T

T/F

Water, Is expected to be a nonpolar substance.

F

T/F

The charge on Manganese in MnO₂ is +4

T

T/F

The combustion of a hydrocarbon is an example of an endothermic reaction

F

exothermic

T/F

Vaporization of water is an exothermic process

F

T/F

The primary intermolecular forces found in carbon dioxide are dispersion attrations.

T

T/F

Chlorine is expected to have a greater boiling point than fluorine

T

T/F

Hydrongen bonding is expected to be the primary intermolecular force in methanol.

T

T/F

Butane gas is expected to sink in air

T

T/F

The reaction 2 Al + 3 Br_{2  -} 2AlBr₃ is an example of double replacement reaction

F

T/F

At STP, 1.0 L Ar has a greater number o gas particles than 1.0 L Ne

F

T/F

A bolloon is filled to a volume of 5.0 L in Des Moines.  The volume of the balloon will be greater in Denver where the atmospheric pressure is less than that found in Des Moines.

T

T/F

Aluminum is reduced in the following reaction: 2 Al + 3 Br₂ - 2 AlBr₃

F

T/F

In general, an increase in temperature will result in an increase in solubility for solid solutes.

T

T/F

Silver chloride is expected to be completely soluble in aqueous solution.

F

T/F

A 1.0 M solution of glucose is expected to have a greater boiling point than a 1.0 M solution of NaCl.

F

T/F

The reaction, PCl₅ - PCl₃ + Cl₂; Kc = 1.2 x 10^-2, primarily will contain products at equilibrium

F

Kc = Products

T/F

Increasing the temperature of an exothermic reaction will result in a greater amount of product at equilibrium.

F

Exothermic - out (product)

Enothermic - In (reactant)

T/F

Adding a catalyst to a reaction mixture will have no effect on the equilibrium constant

T

T/F

An acid is a substance that ionizes in water to produce hydroxide ion.

F

hydronium

T/F

The pH of a 0.10 M solution of a weak acid is expected to have a pH greater than 1.0

T

T/F

An aqueous solution of KCl is expected to be slightly acidic

F

T/F

The pH of a 0.10 M solution of NaOH is expected to be 1.0

F