Quiz 3a (10.28.2020) Flashcards Preview

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Flashcards in Quiz 3a (10.28.2020) Deck (14)
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1

The mass of an individual molecule or formula unit, also known as molecular mass or molecular weight

formula mass

2

Molar mass = ______ (in g/mol)

formula mass

3

Simplest whole-number ratio of the atoms of elements in a compound

empirical formula

4

An empirical formula represents a ratio of atoms or a ratio of moles of atoms, not a ratio of __

masses

5

Finding empirical formula

convert percentages to grams, convert grams to moles, write pseudo formula using moles as subscripts, divide all by smallest # of moles, multiply by a # to make all whole #s

6

The ____ formula is a multiple of the empirical formula

molecular

7

To determine the molecular formula, you need to know the empirical formula and the molar mass of the compound. Molecular formula = (empirical formula)n. n = molar mass divided by ____

empirical formula molar mass

8

In combustion analysis, all the original c forms CO2, the original h forms H2O, and the original mass of O is found by ____

subtraction

9

The study of the numerical relationship between chemical quantities in a chemical reaction is called ____

stoichiometry

10

The reactant that makes the least amount of product ___

limiting reactant

11

this is the amount of product that can be made in a chemical reaction based on the amount of limiting reactant____

theoretical yield

12

the actual amount of product made in a chemical reaction is called the____

actual yield

13

the percentage of the maximum number of product we can actually make

percent yield

14

the reactant in excess is any reactant that occurs in a quantity greater than is required to

completely react with the limiting reactant