Free Printable CHE 022 LABORATORY EXAM

Worksheets

CHE 022 LABORATORY EXAM

Total questions: 21

Worksheet time: 13mins

Name

Class

Date

STUDENT NAME (LAST, GIVEN M.I)

4 lines

The distribution of electrons in the different orbitals in an atom is shown by?

electron configuration only

orbital diagram only

both electron configuration and orbital diagram

none of the above

What orbital is being represented on the illustration below?

s orbital

p orbital

d orbital

f orbital

Which element is being represented by the orbital diagram below?

potassium

aluminum

magnesium

sulfur

What is the chemical name of GaAs?

Gallium arsenide

Gallium arsenic

Gallium monoarsenide

Gallium monoarsenic

What is the chemical formula of potassium bromide?

KBr

KBro

KBrn

Which of the following compound is not matched according to what it is used for?

NaCl – treat or prevent sodium loss due to dehydration

KI – protects the thyroid gland from possible injury by unreactive iodine

NaF – used as an insecticide

CaCO3 – a dietary supplement

What is the chemical formula of Perchloric Acid?

HClO4

HClO3

HClO2

HClO

What is the chemical formula of Tetrathionic acid?

H2S4O6

H2SO4

H2S2O3

H2SO3

10.

What is the chemical formula of Trisilicon tetranitride?

Si3N4

Si4N3

Si3N

SiN4

11.

A basketball contains 0.524 moles of gas. After the basketball popped, 11.7 liters of gas were released at STP. Which of the conversion factors will be used to get the correct answer? (Molecular weight of N2= 28.02 g/mol)

22.41 L of gas/ 1 mole of gas

22.41 L of N2/ 1 mole of gas

5 mole/ 22.41 L of gas

1 mole/ 22.41 L of gas

12.

A water bottle contains 32.8 moles of water. How many grams of water does the bottle contain? (Molecular weight of H2O= 18.02 g/mol)

519.06 g of H2O

51.906 g of H2O

915.06 g of H2O

195.06 g of H2O

13.

How many grams are 15.25 moles of Potassium (K)? Atomic weight = 39.10 g/mol

596.28 grams

521.28 grams

534.28 grams

556.28 grams

14.

Calculate the molecular mass/formula mass (H= 1.0 g/mol, N= 14.0 g/mol, 0= 16.00 g/mol)

63.0 g/mol

24.56 g/mol

76.92 g/mol

58.51 g/mol

15.

Calculate the molecular mass/formula mass ( Ca= 40.00 g/mol, Cl= 35.45 g/mol)

110.1 g/mol

201.1 g/mol

103.3 g/mol

251.6 g/mol

16.

What did Sir Joseph Thomson propose as the structure of the atom after his experiments with the cathode ray tube?

Plum Pudding Model

Bohr Model

Rutherford Model

Dalton Model

17.

In creating your DIY Atomic Model, what do the beads represent?

Chemical symbol, Atomic number, Atomic mass

Electrons, Protons, Atomic number

Neutrons, Electrons, Protons

Protons, Neutrons, Chemical symbol

18.

In the Laboratory # 8 exercise, determine below the name of the website that you visited:

Building an Atom

Making Matter

Creating Matter Building an Atom

Making Matter Build an Atom

19.

An atom has an atomic number of 56 and contains 82 neutrons. What is its mass number?

138

20.

What is the center of an atom called?

Electrons

Protons

Neutrons

Nucleus

21.

He is best known for the development of the periodic table of elements. Which of the following is his full name, following the country where he was born?

Dmitri Mendeleev

Dmitry Ivanovich Mendeleyev

Dmitry Mendeleev

Dmitri Ivanovich Mendeleev

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CHE 022 LABORATORY EXAM

Total questions: 21

Worksheet time: 13mins

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