Questions from General Chemistry

Q: Round off each of the following numbers to two significant digits,

Round off each of the following numbers to two significant digits, and express the result in standard scientific notation. a. 1,566,311 b. 2.7651 * 10-3 c. 0.07759 d. 0.0011672

Q: Round off each of the following numbers to the indicated number of

Round off each of the following numbers to the indicated number of significant digits and write the answer in standard scientific notation. a. 4341 * 102 to three significant digits b. 93.441 * 103...

Q: When a large or small number is written in standard scientific notation

When a large or small number is written in standard scientific notation, the number is expressed as the product of a number between 1 and 10, multiplied by the appropriate power of 10. For each of the...

Q: Round off each of the following numbers to the indicated number of

Round off each of the following numbers to the indicated number of significant digits, and write the answer in standard scientific notation. a. 0.00034159 to two digits b. 103.351 * 102 to five digi...

Q: Consider the calculation indicated below: / Explain

Consider the calculation indicated below: Explain why the answer to this calculation should be reported to only two significant digits.

Q: The following water measurements are made: 18 mL of water measured

The following water measurements are made: 18 mL of water measured with a beaker, 128.7 mL of water measured with a graduated cylinder, and 23.45 mL of water measured with a buret. If all of these wat...

Q: When the calculation (2.31)(4.9795 *

When the calculation (2.31)(4.9795 * 103)/(1.9971 * 104) is performed, how many significant digits should be reported for the answer? You should not need to perform the calculation.

Q: Which of the following are true? a. P4 is

Which of the following are true? a. P4 is considered a compound. b. Metal rusting on a car is a chemical change. c. Dissolving sugar in water is a chemical change. d. Sodium chloride (NaCl) is a h...

Q: When the sum 4.9965 + 2.11 + 3

When the sum 4.9965 + 2.11 + 3.887 is calculated, to how many decimal places should the answer be reported? You should not need to perform the calculation.

Q: How many digits after the decimal point should be reported when the

How many digits after the decimal point should be reported when the calculation (10,434 -9.3344) is performed?