College Chemistry Final Exam Practice 2023

When the calculation of 5.2 - 2.25 is performed, how many decimal places should the result have?

When the calculation of 5.5 M x 25.10 mL is performed, how many significant figures should the result have?

The density of aluminum is 2.25 g/mL. What is the volume in mL of a piece of aluminum with a mass of 10.50 grams? (Do not include units. Round to correct sig figs.)

When the calculation of 241.02 grams / 52.4 grams is performed, how many significant figures should the result have?

A student measures the mass of a substance to be 22.5 grams. Since the substance actually has a mass of 22.05 grams, what is the percent error? Do not include units. Round to three sig figs.

Perform the following calculation. Your answer must contain the proper number of significant figures to receive credit. What is the density in (g/mL) of a piece of metal with a mass of 18.566 grams if the water level of a graduated cylinder increases from 12.8 mL to 15.4 mL when the metal is submerged? Do not include units.

This atom contains how many neutrons?

• 63

• 29

• 79

• 34

Which element has an electron configuration of

• Ge

• Br

• As

• Ga

How many valence electrons are in an atom of carbon? (Enter your answer as a number only, example: "8" NOT "eight".)

What solid precipitate will form between calcium nitrate and sodium fluoride?

• NaF

• No Reaction