Chemistry Unit 1 Test Review

Front

What is the purpose of a beaker in a laboratory?

Back

A beaker is used for measuring and holding liquids, but it is not precise for measuring exact volumes.

Front

What is the significance of significant figures in calculations?

Back

Significant figures indicate the precision of a measurement and help in reporting results accurately.

Front

What is a pipet used for in a laboratory?

Back

A pipet is used to transfer small, precise amounts of liquid.

Front

How many yards are in 0.25 miles? (Hint: 5280 feet = 1 mile, 3 feet = 1 yard)

Back

440 yards.

Front

How many centigrams are in 853 grams?

Back

85,300 centigrams.

Front

What is the formula for converting miles to yards?

Back

Multiply the number of miles by 1,760 (since 1 mile = 1,760 yards).

Front

Define the term 'significant figures'.

Back

Significant figures are the digits in a number that contribute to its precision.

Front

What is the difference between a beaker and a graduated cylinder?

Back

A beaker is used for mixing and holding liquids, while a graduated cylinder is used for precise measurements.

Front

What is the conversion factor from grams to centigrams?

Back

1 gram = 100 centigrams.

Front

Explain why 40.5 x 2.50 = 101 should be reported as 101.

Back

The result is rounded to 3 significant figures, based on the least precise measurement (2.50 has 3 significant figures).