Chapter 1, Problem 1.66E

Classify each of the following as (1) a physical property, (2) a physical change, (3) a chemical property, or (4) a chemical change. a. the process of decomposing hydrogen peroxide b. the fact that a block of ice can be chipped into smaller pieces c. the process of evaporating a liquid d. the fact that water freezes at 32F

The beakers shown below have different precisions. a. Label the amount of water in each of the three beakers to the correct number of significant figures. b. Is it possible for each of the three beakers to contain the exact same amount of water? If no, why not? If yes, did you report the volumes as the same in part a? Explain. c. Suppose you pour the water from these three beakers into one container. What should be the volume in the container reported to the correct number of significant figures?

The weight of a metal sphere was measured to be 9.81 g. Unfortunately, the caliper that was supposed to be used in measuring the dimensions of the sphere broke. The metal that make up the sphere was identified to be an alloy of iron and chromium with a density of 7.26 g/cm3. Using the data given, calculate the radius of the metal sphere in cm. Round your answer to 2 decimal places.

please make sure the answer has the correct number of significant digits

A sample of gold alloy has a mass of 9.3 kg. It is determined that 0.6 kg of the alloy is actually made up of copper and zinc, with the remainder being gold. Calculate the percentage of this gold in the alloy? Express your answer to the nearest percentage (nearest ones place). Hint: calculate the mass in grams of the gold in the alloy, divide by the whole mass of the alloy, and multiply by 100%. Round your answer to two significant figures. (I had to alter the wording of this question since it wasn't calculating significant figures properly, so if you got it wrong because of significant figures you can assume you probably actually got it correct.)

In a 1.018E2 g sample of iron(III) oxide, how many grams of iron are present? Your answer should have the appropriate number of significant figures (use two decimal places in atomic masses). Only give the numeric value of your answer. Don’t include the units. Respond with the correct number of significant figures in scientific notation

Please answer this question as fast as you can please and tahnk you. I will afterwards write an wonderful review on solving the question. Thank you. Carry out the following calculations, making sure that your answer has the correct number of significant figures. 5.48 x 12.73 = ?

Suppose you were measuring out an organic liquid, and some of it is evaporated after you have performed the volumetric measurement while you are weighing out the sample. What effect would this have on the densities you calculated? Will you overestimate or underestimate the density of the liquid? Would this cause poor accuracy, low precision, or both? Explain briefly.

State the rules governing the use of significant figures in Adding/subtracting measurements.  How does this compare with multiplication/division of measurements?  Please cite an example of the rule governing addition or subtraction.