Chapter 3 Flashcards Preview

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Flashcards in Chapter 3 Deck (13):
1

What is the average mass of a molecule or formula unit?

Formula mass

2

To calculate formula mass we find the sum of atomic masses of all atoms in the chemical ____________.

Formula

3

The mass in grams of 1 mole of its molecules or formula units is it’s what?

Molar mass

4

A pure compound always consist of the same elements combined in the same proportions by ________.

Mass

5

A pure compound can express molecular composition as percent by _________.

Mass

6

The formula showing the simplest ratio of moles of atoms of each component is what?

Empirical formula

7

What is the formula showing the exact number of atoms of each element in a compound?

Molecular formula

8

For the empirical formula we need a ________ number.

Whole

9

We need to do an experiment to find the molar mass of the empirical ____________.

Formula

10

What depicts the kinds of reactants and products and their relative amounts in a reaction?

Chemical equations

11

The numbers in front of the chemicals of the chemical equation are called what?

Stoichiometric coefficients

12

The letters (s), (g), and (l) in the chemical equations are the ____________ states of the compounds.

Physical

13

Because of the principle of the conservation of mass an equation must be what?

Balanced