Answered: In its most basic form, what is…

In its most basic form, what is significant figures? Why is it necessary to learn it? What is its significance in chemical analyses?

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter1: Matter And Measurements

Section: Chapter Questions

Problem 67QAP: How do you distinguish (a) chemical properties from physical properties? (b) distillation from...

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How do you distinguish (a) chemical properties from physical properties? (b) distillation from filtration? (c) a solute from a solution?
or dividing measurements A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. 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: 5.250 g • She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 75.41 g. • She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 37.4 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. -1 Explanation Check 2021 McGraw-Hill Education All Rights Reserved Terms of Use Privacy Accessibility Thank The # $ % & 2 3
O MEASUREMENT Adding or subtracting and multiplying or dividing measurements A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. 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: 1.5 g • She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 36.669 g. • She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 37.11 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. g mL Explanation -1 Check 99+ 0/5 VUDU © 2023 McGraw Hill LLC. All Rights…
A 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 × Ś
Butane (C4H10) plus Oxygen yields carbon dioxide plus water. b. Balance the chemical equation. 2C4H10(g) + 13O2(g)→ 8CO2(g) + 10 H2O(g) c. What type of chemical reaction is it? d. Is this a physical or a chemical reaction? Please justify your answer by providing evidence from the chemical equation.
The composition of a mixture of potassium chlorate and potassium chloride is to be determined. A 8.96 gram sample of the mixture is heated until the creation of oxygen gas stops. If the sample mass after heating is 7.89 grams, what is the percent by mass of potassium chlorate in the mixture? Report your answer with 3 significant figures.
A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. 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: 6.20 g • She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 34.241 g. • She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 61.69 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
A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. 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: 8.200 g • She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 45.74 g- • She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 24.09 ml. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. ml
Franklin was performing an experiment by combining hydrochloric acid and sodium hydroxide. He measured the mass of his reactant materials to be 35g. The reaction resulted in the production of salt and water. He reported that his products weighed 32g. Which best describes the results of Franklin’s experiment? No error occurred, some of the products are always lost as heat. An error occurred, the mass of the reactants should equal the mass of the products. An error occurred, the products should weigh more than the reactants. No error occurred, water is not weighed when determining the weight of the products.
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?
Decide whether each proposed multiplication or division of measurements is possible. If it is possible, write the result in the last column of the table. proposed multiplication or division Is this possible? result 480. mg O yes = ? 0.080 g O no O yes (3.0 g) · (0.029 kg) = ? O no O yes (7.0 m) · (6.0 s) = ? O no O Ooo
Fill in the Blanks Chemical Price/kg (in dollars) NaOH 21.17 CaCl2 41.28 КОН 31.38 CUSO4 93.32 NH4NO3 59.64 NH4CI 25.04 NaCl 21.15 NaNO3 72.35 Type your answers in all of the blanks and submit Another requirement is that the cost of the salt needs to be evaluated to determine if it is economical to use. To do this, you should consider the price per degree of dropping the temperature of the solution. The table of prices per kg for each salt is shown above. Let's determine the cost for the NaOH solid as an example. We want to determine how much it costs to change the temperature by 1 deg C so we start with the cost given in the table and end with $/deg C. For NaOH: 21.17 $/ 1 kg) X ( 1 kg/ 1000 X ( Type your answer here g/ Type your answer here deg C) Please type your answer to submit Please type your answer to submit Type your answer here $/deg C