Questions from General Chemistry

Q: Is the density of a gaseous substance likely to be larger or

Is the density of a gaseous substance likely to be larger or smaller than the density of a liquid or solid substance at the same temperature? Why?

Q: What property of density makes it useful as an aid in identifying

What property of density makes it useful as an aid in identifying substances?

Q: Referring to Table 2.8, which substance listed is most

Referring to Table 2.8, which substance listed is most dense? Which substance is least dense? For the two substances you have identified, for which one would a 1.00-g sample occupy the larger volume?...

Q: Referring to Table 2.8, determine whether magnesium, ethanol

Referring to Table 2.8, determine whether magnesium, ethanol, silver, or salt is the least dense. From table 2.8:

Q: In a sample of a gaseous substance, more than 99%

In a sample of a gaseous substance, more than 99% of the overall volume of the sample is empty space. How is this fact reflected in the properties of a gaseous substance compared with the properties o...

Q: For the masses and volumes indicated, calculate the density in grams

For the masses and volumes indicated, calculate the density in grams per cubic centimeter. a. mass = 4.53 kg; volume = 225 cm3 b. mass = 26.3 g; volume = 25.0 mL c. mass = 1.00 lb; volume = 500. cm...

Q: The element bromine at room temperature is a liquid with a density

The element bromine at room temperature is a liquid with a density of 3.12 g/mL. Calculate the mass of 125 mL of bromine. What volume does 85.0 g of bromine occupy?

Q: Indicate the number of significant digits in the answer when each of

Indicate the number of significant digits in the answer when each of the following expressions is evaluated (you do not have to evaluate the expression). a. (6.25)/(74.1143) b. (1.45)(0.08431)(6.022...

Q: Although some elements are found in an isolated state, most elements

Although some elements are found in an isolated state, most elements are found combined as with other elements.

Q: Write each of the following numbers in standard scientific notation, rounding

Write each of the following numbers in standard scientific notation, rounding off the numbers to three significant digits. a. 424.6174 b. 0.00078145 c. 26,755 d. 0.0006535 e. 72.5654