2. Chemical Formulas and Composition Stoichiometry

Dodong Aleta
Quiz by Dodong Aleta, updated more than 1 year ago
Dodong Aleta
Created by Dodong Aleta almost 6 years ago
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Chemical Formulas and Composition Stoichiometry

Resource summary

Question 1

Question
The word "stoichiometry" is derived from the Greek __, which means "first principle or element," and metron, which means to measure.
Answer
  • stoicheios
  • stoichros
  • stoicheion
  • stoichos

Question 2

Question
It describes the quantitative relationships among elements in compounds and among substances as they undergo chemical changes.
Answer
  • Analytical Chemistry
  • Molecular Chemistry
  • Physical Chemistry
  • Stoichiometry

Question 3

Question
Different forms of the same element in the same physical state are called __.
Answer
  • Allotropes
  • Isomers
  • Isotopes
  • Stereoisomers

Question 4

Question
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.
Answer
  • ionic unit
  • formula unit
  • structural unit
  • atomic unit

Question 5

Question
It is defined as exactly 1/12 of the mass of an atom of a particular kind of carbon atom, called carbon-12.
Answer
  • Atomic Mass Unit (amu)
  • Atomic Molecular Unit (amu)
  • American Multi-Universe (amu)
  • Atomic Measuring Unit (amu)

Question 6

Question
The __ of a compound is the smallest, whole-number ratio of atoms present.
Answer
  • empirical formula
  • molecular formula
  • structural formula
  • chemical formula
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