Lesson 4

Question 1

What is a synthetic chemist?

Answer 1

One who makes new compounds

Question 2

What is an analytical chemist?

Answer 2

One that analyzes the compound to provide experimental proof of its composition and its chemical formula

Question 3

It is the analytical chemist’s job to identify the elements a compound contains and determine their percents by mass

Answer 3

It is the analytical chemist’s job to identify the elements a compound contains and determine their percents by mass

Question 4

Gravimetric and volumetric analyses are experimental procedures based on the measurement of mass for solids, liquids, respectively.

Answer 4

Gravimetric and volumetric analyses are experimental procedures based on the measurement of mass for solids, liquids, respectively.

Question 5

The percent by mass of each element in a compound is the percent composition of a compound

Answer 5

The percent by mass of each element in a compound is the percent composition of a compound

Question 6

The percent by mass of an element in a compound is the mass of the element in 1 mol of the compound divided by the molar mass of the compound, multiplied by 100

Answer 6

The percent by mass of an element in a compound is the mass of the element in 1 mol of the compound divided by the molar mass of the compound, multiplied by 100

Question 7

The empirical formula for a compound is the formula with the smallest whole-number mole ratio of the elements

Answer 7

The empirical formula for a compound is the formula with the smallest whole-number mole ratio of the elements

Question 8

To identify a new compound, a chemist determines the molecular formula, which specifies the actual number of atoms of each element in one molecule or formula unit of the substance

Answer 8

To identify a new compound, a chemist determines the molecular formula, which specifies the actual number of atoms of each element in one molecule or formula unit of the substance