Concept explainers
(a)
Interpretation:
The information that is given in the statement “A white chemical compound has a mass of
Concept Introduction:
Physical properties:
The properties which are measured or observed without change in composition of matter are said to be physical properties. These includes appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity and so on.
Chemical properties:
The properties that are observed when a substance undergoes any
Qualitative properties:
The measure of the quality of something rather than its quantity is said to qualitative observation. It includes size, appearance, value and so on.
Quantitative properties:
The measure of the quantity of something rather than its quality is said to be quantitative observation. Quantity of the substance is indicated in numerical values.
(b)
Interpretation:
The information that is given in the statement “A sample of lithium metal, with a mass of
Concept Introduction:
Refer to part (a).
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OWLv2 for Moore/Stanitski's Chemistry: The Molecular Science, 5th Edition, [Instant Access], 1 term (6 months)
- A student measures that the mass of a sugar solution is 5.70 g and the volume of the solution is 5.0 mL. (a) Calculate the density of the solution. (b) Calculate the concentration (mass/mass %) of the solutionarrow_forward7. Suppose you make a solution that contains 17.59 g of sodium chloride and 960 g of water. (a) What is the mass % of sodium chloride? (b) If 16.47 mL of your solution weighs 16.651 g,what is the density (in g/cc)?arrow_forwardMethyl benzoate is an oily liquid with a boiling point of 199°C. What volume of methyl benzoate is needed to prepare 5.8 grams of benzoic acid? The density of methyl benzoate is 1.08 g·cm⁻³. Molar masses are given in Figure 4. [Give only the number without the unit. Give the answer in cubic centimetres and round to 1 decimal place. Use a decimal point.] * Your answerarrow_forward
- (a) The sodium ion did not take part in this chemical reaction(Diluted H2SO4(aq) versus NaOH(aq)). What do we call such an ion?(b) Draw a simple diagram which shows how the sodium ion mixes with water in solution.What do we call this physical process?arrow_forwardClassify each property as physical or chemical. (a) the tendency of copper to turn green when exposed to air(b) the tendency of automobile paint to dull over time(c) the tendency of gasoline to evaporate quickly when spilled(d) the low mass (for a given volume) of aluminum relative to other metalsarrow_forwardA group of students took turns using a laboratory balanceto weigh the water contained in a beaker. The results theyreported were 111.42 g, 111.67 g, 111.21 g, 135.64 g,111.02 g, 111.29 g, and 111.42 g.(a) Should any of the data be excluded before the average is calculated?(b) From the remaining measurements, calculate the average value of the mass of the water in the beaker.(c) Calculate the standard deviation s and, from it, the 95% confidence limit.arrow_forward
- Suppose 25.4 grams of NaCl was added to 400 mL of water. The resulting solution was again diluted with water 1:100 with water. What is the final concentration of the NaCl in μM? The molecular weight of NaCl is 58.44.arrow_forwardContainer A and Container B were filled completely with chicken powder. The total mass of 1/3 of the chicken powder in Container B and 1/11 of the chicken powder in Container A was 570 g. If 5/11 of the chicken powder in Container A was poured out, the total mass of the chicken powder in both containers became 2.28 kg. How much chicken powder was in (a) Container A in grams? (b) Container B in grams?arrow_forwardGive an example of a mixture in which solute is solid and solvent is liquid.arrow_forward
- You heat 2.53 grams of metallic mercury in air, which produces 2.73 grams of red-orange residue. Assume that the chemical change is the reaction of the metal with oxygen in the air. What is the mass of oxygen that react? When you strongly heat the red- orange residue, it decomposes to give her back the mercury and release the oxygen, which you collect. What is the mass of oxygen you collected?arrow_forwardA chemistry student must write down in her lab notebook the concentration of a solution of potassium chloride. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 1.55 g • She put some solid potassium chloride into the graduated cylinder and weighed it. With the potassium chloride added, the cylinder weighed 31.436 g. • She added water to the graduated cylinder and dissolved the potassium chloride completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 166.4 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. -1 g.mL x10 × Śarrow_forwardSoft wood chips weighing 17.2 kg are placed in an iron vessel and mixed with 150.1 kg water and 22.43 kg sodium hydroxide. A steel lid seals the vessel, which is then placed in an oven at 250°C for 6 hours. Much of the wood fiber decomposes under these conditions; the vessel and lid do not react.(a) Classify each of the materials mentioned as a substance or mixture. Subclassify the substances as elements or compounds.(b) Determine the mass of the contents of the iron vesselafter the reaction.arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningWorld of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage Learning