Chemistry Semester 1 Final

Front

How many significant figures does the number 1.240 have?

Back

4 significant figures.

Front

What is the best classification for a combination of black beads and red beads?

Back

Heterogeneous mixture.

Front

How many valence electrons does carbon have?

Back

4 valence electrons.

Front

Convert 130,000 milliliters (mL) into liters (L).

Back

130 L.

Front

What is the formula for dinitrogen trioxide?

Back

N₂O₃.

Front

Define significant figures in measurements.

Back

Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a combination of two or more substances that are not uniformly distributed, meaning the different components can be seen and separated.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of chemical elements, organized by increasing atomic number, which shows periodic trends in properties.

Front

What is the difference between a pure substance and a mixture?

Back

A pure substance has a uniform and definite composition, while a mixture contains two or more substances that retain their individual properties.

Front

How do you convert milliliters to liters?

Back

To convert milliliters to liters, divide the number of milliliters by 1,000.