The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak conductor of electricity, its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air. Which of the following is a chemical property of silicon? its ability to conduct electricity its density its melting point its ability to react with oxygen A Moving to another question will save this response. « < Question 7 of 42

The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak conductor of electricity, its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air. Which of the following is a chemical property of silicon? its ability to conduct electricity its density its melting point its ability to react with oxygen A Moving to another question will save this response. « < Question 7 of 42

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter1: Basic Concepts Of Chemistry

Section1.7: Physical And Chemical Changes

Problem 1RC: When camping in the mountains, you boil a pot of water on a campfire to make tea. Which of the...

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Suppose that you are closing a cabin in the north woods for the winter and you do not want the water in the toilet tank to freeze. You know that the temperature might get as low as 30. C, and you want to protect about 4.0 L water in the toilet tank from freezing. Calculate the volume of ethylene glycol (density = 1.113 g/mL; molar mass = 62.1 g/mol) you should add to the 4.0 L water.
A 2.0-mer volume of hydrogen gas combined with 1.0 liter of oxygen gas to produce 2.0 liters of water vapor. Does oxygen undergo a chemical or physical change?
When camping in the mountains, you boil a pot of water on a campfire to make tea. Which of the following is a chemical change? (a) The water boils. (b) The campfire wood burns. (c) The tea dissolves in the hot water. (d) The pot melts from the heat of the fire.
What properties distinguish solids from liquids? Liquids from gases? Solids from gases?
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In the equation Ni+Cu(NO3)2Ni(NO3)2+Cu, which of the reactants is/are elements, and which of the products is/are compounds?
5 Water is evaporated from the magnesium chloride solution. The resulting solid is melted at 700°C and decomposed by passing electric current through it. (a) What is the name of the physical change that occurs first in the magnesium chloride? (b) Write the balanced chemical equation for this step. (c) Identify the type of chemical reaction.
A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration of 28.44 g L . The geochemist also -1 measures the concentration of salt in several nearby non-isolated lakes, and finds an average concentration of 6.22 g.L -- Assuming the salt concentration in Lake Parsons before it became isolated was equal to the average salt concentration in nearby non-isolated lakes, calculate the percentage of Lake Parsons which has evaporated since it became isolated. Be sure your answer has the correct number of significant digits. 國 do ロ x10 Continue Submit Assignment O 2020 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy I Accessibility <. arse Syllabus...pdf FINAL PAPER W....pdf - Document26.pdf MacBook Air F11 F10 F8 F9 O00 O00 F7 20 F6 F4 F5 F2 F3 F1 & 8.
You are given a hammer a battery, a bulb, wires and switch(a) How could you use them to distinguish between samples of metals and non metals?(b) Assess the usefulness of these tests to distinguish between metals and non-metals
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One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 200. mL sample of groundwater known to be contaminated with iron(III) chloride, which would react with silver nitrate solution like this: FeCl3(aq) + 3 AgNO3(aq) 3 AgCl(s) + Fe(NO3),(a9) The chemist adds 56.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected 2.8 mg of silver chloride. Calculate the concentration of iron(III) chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant digits. mg L Submit Assignment Continue Accessibility Privacy O 2020 McGraw-Hill Education. All Rights Reserved. Terms of Use 888 %23 5 6 2 3 E R. G…
You must show calculations in the space pr receive credit. he line to 1. The following data was obtained by a student heating a mixture of BaCl2•2 H2O and an inert material. Calculate the percent of BaCl2•2 H2O in the sample 24.525 g 26.716 g 26.504 g olod slam Lo Mass of crucible Mass of crucible and mixture Mass of crucible and mixture after heating mby