Chapter 1, Problem 1.80AE

Experiments were done on a certain pure substance X to determine some of its properties. There's a description of each experiment in the table below. In each case, decide whether the property measured was a chemical or physical property of X, if you can. If you don't have enough information to decide, choose can't decide in the third column.

Perform the calculation shown. What is the answer rounded to the correct number of significant figures? Include the correct unit. Be Careful!! BE SURE you only include the correct number of significant figures based on this operation as that is what this question is really checking. (3.336x10^8) g divided by (1.1x10^-1) mL Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: Answer x10 units

The mass unit associated with density is usually grams. If the volume (in mL or cm³) is multiplied by the density (g/mL or g/cm³) the volume units will cancel out, leaving only the mass units. Keep in mind that the volume and density must use the same volume unit for the cancellation. If a large marshmallow has a volume of 2.00 in³ and density of 0.242 g/cm³, how much would it weigh in grams? 1 in3 16.39 cm³. Express your answer in grams to three significant figures. • View Available Hint(s) ΑΣφ ? DA mass of marshmallow =

Finally, sometimes the desired value does not directly match the units given but is derived from the calculation required. For example, a sheet of metal that has a volume of 45.5 cm3 has a width of 14.8 cm and has a length 15.9 cm. What is the thickness (that is, the height) of the metal sheet in millimeters?

Which of the following are CORRECT regarding significant figures? In your answer, please list the numbers designating statements that are CORRECT. 1) when multiplying or dividing numbers, the result only has as many significant figures as the factor with the fewest significant figures- the purpose of significant figures is to indicate accuracy of a measured quantity 2) when adding or subtracting numbers, the result only has as many significant figures as the factor with the fewest significant figures 3) when adding or subtracting numbers, the result only has as many decimal places as that of the factor with the fewest decimal places 4) the purpose of significant figures is to indicate the precision of a measured quantity 5) countable quantities impact the number of significant figures in a calculation 6) when multiplying or dividing numbers, the result only has as many decimal places as that of the factor with the fewest decimal places

For each of the following, decide which block is more dense; the orange block, the blue block, or it cannot be determined. Explain your answers.

A student needs to determine density of a liquid. The student determines mass of an empty.flask to be 251.21 g and then adds 224 mL of liquid to it. The mass of the flask with liquid is 451.13 g. What is the density of the solution in units of g/mL?

The mass unit associated with density is usually grams. If the volume (in ml or cm3) is multiplied by the density (g/mL or g/cm3) the volume units will cancel out, leaving only the mass units. Keep in mind that the volume and density must use the same volume unit for the cancellation. If a large marshmallow has a volume of 2.50 in3 and density of 0.242 g/em3, how much would it weigh in grams? 1 in3=16.39 cm3. Express your answer in grams to three significant figures.

Which of the following are the same and which are different? a. a substance and a pure substance b. a heterogeneous mixture and a solution c. a substance and a mixture d. a homogeneous mixture and a solution