Dodong Aleta
Quiz by , created more than 1 year ago

Chemical Formulas and Composition Stoichiometry

66
2
0
Dodong Aleta
Created by Dodong Aleta over 9 years ago
Close

2. Chemical Formulas and Composition Stoichiometry

Question 1 of 6

1

The word "stoichiometry" is derived from the Greek __, which means "first principle or element," and metron, which means to measure.

Select one of the following:

  • stoicheios

  • stoichros

  • stoicheion

  • stoichos

Explanation

Question 2 of 6

1

It describes the quantitative relationships among elements in compounds and among substances as they undergo chemical changes.

Select one of the following:

  • Analytical Chemistry

  • Molecular Chemistry

  • Physical Chemistry

  • Stoichiometry

Explanation

Question 3 of 6

1

Different forms of the same element in the same physical state are called __.

Select one of the following:

  • Allotropes

  • Isomers

  • Isotopes

  • Stereoisomers

Explanation

Question 4 of 6

1

There are no "molecules" of ionic substances, thus one should not refer to a "molecule of sodium chloride, NaCl." Instead, they are referred to as a __. It represents the smallest, whole-number ratios of ions that yield neutral representations of all substances (both ionic and non-ionic). Therefore, one __ of propane, C3H8, is the same as one molecule of C3H8.

Select one of the following:

  • ionic unit

  • formula unit

  • structural unit

  • atomic unit

Explanation

Question 5 of 6

1

It is defined as exactly 1/12 of the mass of an atom of a particular kind of carbon atom, called carbon-12.

Select one of the following:

  • Atomic Mass Unit (amu)

  • Atomic Molecular Unit (amu)

  • American Multi-Universe (amu)

  • Atomic Measuring Unit (amu)

Explanation

Question 6 of 6

1

The __ of a compound is the smallest, whole-number ratio of atoms present.

Select one of the following:

  • empirical formula

  • molecular formula

  • structural formula

  • chemical formula

Explanation

Previous
Next