Questions from General Chemistry

Q: By how many places must the decimal point be moved, and

By how many places must the decimal point be moved, and in which direction, to convert each of the following to “ordinary” decimal numbers? a. 4.311 * 106 b. 7.895 * 10-5 c. 8.712 * 101 d. 4.995 *...

Q: Sunflower oil has a density of 0.920 g/mL

Sunflower oil has a density of 0.920 g/mL. What is the mass of 4.50 L of sunflower oil? What volume (in L) would 375 g of sunflower oil occupy?

Q: If 1000. mL of linseed oil has a mass of 929

If 1000. mL of linseed oil has a mass of 929 g, calculate the density of linseed oil.

Q: A material will float on the surface of a liquid if the

A material will float on the surface of a liquid if the material has a density less than that of the liquid. Given that the density of water is approximately 1.0 g/mL under many conditions, will a blo...

Q: For Exercises 13–14 Magnesium metal is very malleable and is

For Exercises 13–14 Magnesium metal is very malleable and is able to be pounded and stretched into long, thin, narrow “ribbons” that are often used in the introductory chemistry lab as a source of the...

Q: Which of the following is/are examples of a chemical change

Which of the following is/are examples of a chemical change? a. carving wood b. snow melting c. dry ice subliming (solid CO2 vaporizing into a gas, passing the liquid state) d. burning cookies in...

Q: Use the information in Table 2.8 to calculate the volume

Use the information in Table 2.8 to calculate the volume of 50.0 g of each of the following substances. a. sodium chloride b. mercury c. benzene d. silver From table 2.8:

Q: Use the information in Table 2.8 to calculate the mass

Use the information in Table 2.8 to calculate the mass of 50.0 cm3 of each of the following substances. a. gold b. iron c. lead d. aluminum From table 2.8:

Q: How do we know when a chemical reaction is taking place?

How do we know when a chemical reaction is taking place? Can you think of an example of how each of the five senses (sight, hearing, taste, touch, smell) might be used in detecting when a chemical rea...

Q: Write the name of each of the following ionic substances, using

Write the name of each of the following ionic substances, using -ous or -ic endings to indicate the charge of the cation. a. CuCl b. Fe2O3 c. Hg2Cl2 d. MnCl2 e. TiO2 f. PbO