Chemistry

Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced.Suppose the CO gas evolved by a certain chemical reaction taking place at 55 degree C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 117 ml.Calculate the mass of CO that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases.
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PLS HELP QUICKLY!!!!!! I AM DOING A TIMED TEST!!!!Which of the following is an example of radiant energy?A. The SunB. A CarC. A Plate if SpaghettiD. Knocking over a glass of water
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which would dissolve faster individual salt crystals a big block of salt
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What is the pH of a solution that has a [ ] = 0.020 M?
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What is heat of vaporization?.It is the heat required to change a substance's temperature by 1C.OB.It is the heat required to change a gram of substance from a solid to a liquid..It is the heat required to change a substance from a solid directly to a gas.OD.It is the heat required to change a gram of substance from a liquid to a gas.O E. It is the heat required to separate one substance into two substances.
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Which best describes heating by convection?Air molecules touch the warm ground, heating it up.Warm air rises and takes heat with it; eventually it cools and sinks.Sunlight travels through empty space without the aid of fluids or solids.
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If a solution has a pOH=12, what is its pH?
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Name the following straight-chain Alkanes (picture)
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How many total atoms from Carbon are present on the reactant side?20 points2CH2+202O2+HC45213
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If you had to choose to live on the moon or mars, explain why you would chooseone over the other based of the science that you know (give at least 4 reasonsand use evidence to support them)( 10 points)
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The specific heat of iron is 0.107 cal/g x oC. How much heat is transferred when a 24.7 kg iron ingot is cooled from 880 oC to 13 oC?
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The teacher made a 0.5M solution. How is this number read/said?
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Calculate the molarity of a nitric acid solution if 38 ml of the solution is neutralized by 16 ml of 0.25 M barium hydroxide solution. The balanced equation for the reaction is
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When a chemical reaction occurs,O a phase change takes placeo the physical and chemical properties of the products are different from the reactantsO the physical and chemical properties of the reactants are the same as the properties of the productso the compounds can be separated by physical means
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5.6 M KCl has 600. mL of water. How many grams are in this solution?
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A gas sample is stored in a 2 liter container under 3 atmospheres of pressure at 28 C. If the gas is placed into a 5 liter container at 39 C, what will the pressure be?
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A 2.00 L container of nitrogen had a pressure of 3.20 atm. What volume would benecessary to decrease the pressure to 1.03 atm?
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A child shivers in a cold rain but does not feel cold, what is the biochemistry behind it
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(a) The original value of the reaction quotient, Qc, for the reaction of H2(g) and I2(g) to form HI(g) (before any reactions take place and before equilibrium is established), was 5.56. On the following graph, plot the points representing the initial concentrations of all three gases. Label each point with the formula of the gas.
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What is the law of redox reactions?
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Could u please balance this equation
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In Humans, the liquid wastefiltered by the kidneys is storedin the ......?A) StomachB) BladderC) LungsD) I'm not sure. I needmore help with thistopic.
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which sublevels contain valence electrons in an atom of nitrogen
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Which of the following is the energy of moving electrons?a. kinetic energyb. thermal energyc. nuclear energyd. electrical energy
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