1, 2 and 4 1. Stibnite, Sb;S1, is a dark gray mineral from which antimony metal is obtained. What is themass percent of antimony in the sulfide? If you have 1.00 kg of an ore that contains 10.6%antimony, what mass of Sb;S3 (in grams) is in the ore?2. Nicotine, a poisonous compound found in tobacco leaves, is 74.0 % C, 8.65 % H, and17.35% N. Its molar mass is 162 g/mol. What are the empirical and molecular formulas ofnicotine?3. Balance the reaction of sodium hydroxide and iron(II) chloride to give iron(1I) hydroxideand sodium chloride, and then write the net ionic equation. Show states for all reactantsand products (s, C, g, aq).4. The "alum" used in cooking is potassium aluminum sulfate hydrate, KAI(SO.): x H20.To find the value of x, you can heat a sample of the compound to drive off all of the waterand leave only KAl(SO.)2.Assume you heat 4.74 g of the hydrated compound and that the sample loses 2.16 g ofwater. What is the value of x?

1. Total molecular mass of Sb2S3 = 339.7 g Mass of Sb = 121.76 g Amount of ore = 1kg = 1000 g 2. C…

Answered: 1, 2 and 4

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.

Question

1, 2 and 4

1. Stibnite, Sb;S1, is a dark gray mineral from which antimony metal is obtained. What is the
mass percent of antimony in the sulfide? If you have 1.00 kg of an ore that contains 10.6%
antimony, what mass of Sb;S3 (in grams) is in the ore?
2. Nicotine, a poisonous compound found in tobacco leaves, is 74.0 % C, 8.65 % H, and
17.35% N. Its molar mass is 162 g/mol. What are the empirical and molecular formulas of
nicotine?
3. Balance the reaction of sodium hydroxide and iron(II) chloride to give iron(1I) hydroxide
and sodium chloride, and then write the net ionic equation. Show states for all reactants
and products (s, C, g, aq).
4. The "alum" used in cooking is potassium aluminum sulfate hydrate, KAI(SO.): x H20.
To find the value of x, you can heat a sample of the compound to drive off all of the water
and leave only KAl(SO.)2.
Assume you heat 4.74 g of the hydrated compound and that the sample loses 2.16 g of
water. What is the value of x?

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