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Quiz on Chemistry 103 Final Exam, created by bsgordon on 29/04/2014.

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Chemistry 103 Final Exam

Question 1 of 21

1

A molecule with a slight charge is?

Select one of the following:

  • ion

  • dipole

  • VSEPR

Explanation

Question 2 of 21

1

Mrs. G in her home lab made 444.0 grams of chocolate butter cream icing. Between licking the spoon only 404.0 grams made it on the cake. What is the percent yeild of icing actually on the cake.

Select one of the following:

  • 90.99%

  • 109.9%

  • 9.009%

  • 91%

Explanation

Question 3 of 21

1

The quantitive study of a chemical reaction is?

Select one of the following:

  • hydrates

  • stoichometry

  • molecular formula

Explanation

Question 4 of 21

1

CBr4 has the shape and angles of which molecular geometry?

Select one of the following:

  • pyramidal, 109 degrees

  • tetrahedral, 109.5 degrees

  • bent, 109 degrees

Explanation

Question 5 of 21

1

An ionic bond is associated with which of the following?

Select one of the following:

  • equal sharing of electrons

  • unequal sharing of electrons

  • the transfer of electrons

Explanation

Question 6 of 21

1

A covalent bonding is?

Select one of the following:

  • give and take of electrons

  • sharing of electrons

  • sharing of neutrons

Explanation

Question 7 of 21

1

How many non binding electron pairs are present in water?

Select one of the following:

  • 0

  • 1

  • 2

  • 4

Explanation

Question 8 of 21

1

The limiting reagent is the reagent that is used up______.

Select one of the following:

  • last

  • second

  • first

  • in excess

Explanation

Question 9 of 21

1

The correct ionic charge (oxidation number) for sulfate ion is?

Select one of the following:

  • 1+

  • 2+

  • 1-

  • 2-

Explanation

Question 10 of 21

1

WHich of the following pairs of elements would form a covalent bond?

Select one of the following:

  • Sulfer and Oxygen

  • Calcium and Fluorine

  • calcium and Iodine

Explanation

Question 11 of 21

1

The correct ionic charge (oxidation number) for calcium ion is....

Select one of the following:

  • 1+

  • 2+

  • 1_

  • 2-

Explanation

Question 12 of 21

1

Formation of a positive ion is the result of an atom:

Select one of the following:

  • losing one or more protons

  • gaining one or more protons

  • losing one or more electrons

  • gaining one or more electrons.

Explanation

Question 13 of 21

1

The mechanism for ionic bond formation always involves the transeferring of

Select one of the following:

  • Electrons from non metal atoms to metal atoms

  • Electrons from metal to metal atom.

  • Electrons from metal atom to non metal atom

  • Electrons from non metal atom to non metal atom

Explanation

Question 14 of 21

1

For Group VA element, choose the appropriate number of valence electrons present-

Select one of the following:

  • 1 valence electrons

  • 5 valence electrons

  • 3 valence electrons

Explanation

Question 15 of 21

1

Which pair of electrons has the greatest repulsion?

Select one of the following:

  • non binding and non binding

  • bonding and bonding

Explanation

Question 16 of 21

1

electronegativity increases-

Select one of the following:

  • down and to the right

  • up and to the right

  • down and to the left

Explanation

Question 17 of 21

1

Calculate the weight in grams of 15.5 moles of oxygen

Select one of the following:

  • 172g

  • .969g

  • 248g

  • 496g

Explanation

Question 18 of 21

1

Elements in groups 2A and 7A of the periodic table would respectively be expected to form ions with charges of:

Select one of the following:

  • +2 and +7

  • -2 and -7

  • +2 and +1

  • +2 and -1

Explanation

Question 19 of 21

1

The "octet rule" relate to the number eight because:

Select one of the following:

  • Only atoms with 8 valence electrons undergo chemical reaction

  • Ions with charges +8 and -8 are stable

  • Atoms react to form compounds so that they contain 8 electrons in their outer shell.

Explanation

Question 20 of 21

1

For representative elements, valence electrons are those electrons located:

Select one of the following:

  • closest to the nucleus

  • in the outermost shell

  • in the outermost subshell

  • in s orbitals

Explanation

Question 21 of 21

1

Which of the following sets of elements is arranged in order of decreasing electronegativity?

Select one of the following:

  • O, S, As

  • Si, B , Cl

  • Br, Cl, P

Explanation

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