Abstract Molar volume is the volume that one mole of gas occupies when temperature and pressure are kept constant. The molar volume of a gas can be determined through evaluating how much gas is given off when the number of moles of the substance is known. To find the volume of gas that will be used to calculate the molar volume‚ the process of water displacement can be used. Reference Citation Cesa‚ J. (2002). ChemTopic labs: Experiments and demonstrations in chemistry (vol. 9). Batavia
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Determining the value of molar mass of chosen compound Marta Dürrigl 1mmA Chemical reaction: b.) CaCO3 (s) + 2HCl (aq) ----------- CaCl2 (aq) + CO2 (g) + H2O(l) AIM: The aim of this investigation is to experimentally determine the molar mass of carbon dioxide (CO2) by measuring its volume and calculating its mass. CO2 which we will measure will arise as a product of a chemical reaction between Calcium Carbonate (CaCO3) and Hydrochloric acid (HCl) as it is shown in the chemical
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Avogadro’s Number and Molar Mass Handout Key 1. What is the coefficient for oxygen when the following equation is balanced using the lowest‚ whole numbered coefficients? ____ C3H8O(g) + ____ O2 (g) ____ CO2 (g) + ____ H2O(g) a) 3 b) 5 c) 7 d) 9 2. What is the sum of the coefficients when the following equation is balanced using the lowest‚ whole numbered coefficients? _____ PH3 (g) + _____ O2 (g) _____ P4O10 (s) + _____ H2O(g) a) 10 b) 12 c) 19 d) 22 3. What is the sum of the coefficients when
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Multiple Choice Questions: (3 points each = 30 points) 1) A graduated cylinder is filled with 25.0 mL of water. A solid sample is dropped into the graduated cylinder and the 3 water rises to the 37.6 mL mark. What is the mass of the solid if its density is 2.81 g/cm ? A) 9.79 g B) 106 g C) 0.223 g D) 70.3 g E) 35.4 g ____________________________________________________________________________ 2) A mass of methanol occupies 0.200 L. What volume would an equal mass of hexane occupy? The density
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Lab Report for Chemical Changes and Conservation of Mass Lab Previous to the reaction‚ the magnesium appeared to be a solid‚ white‚ black‚ and grey substance with many small dark particles within the substance. The hydrochloric acid was a clear liquid that looked like water It weighed 42.2 grams in total. During the reaction‚ the two substances produced bubbles‚ creating smoke and became warm with a smell that is irritating to the human nose. After the reaction‚ it appeared to be a clear‚ bubbly
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The Ka and Molar Mass of a Monoprotic Weak Acid Chemistry Lab 152 Professor: James Giles November 7‚ 2012 Abstract: The purpose of this experiment was to determine the pKa‚ Ka‚ and molar mass of an unknown acid (#14). The pKa was found to be 3.88‚ the Ka was found to be 1.318 x 10 -4‚ and the molar mass was found to be 171.9 g/mol. Introduction Acids differ considerable as to their strength. The difference between weak and
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Using a Dumas method‚ you are asked to identify the unknown pure liquid by comparing the molar masses of the given possible substances (ethanol‚ methanol‚ isopropanol‚ acetone). Introduction Dumas Method allows us to measure the molar mass of the substance‚ using the Ideal Gas Law. The Ideal Gas Law‚ PV=nRT‚ explains the behaviour of the gases that are near 100kPa and in the room temperature. This equation shows the product of the pressure(P) and volume(V) equals to the product of the number of moles(n)
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CORROSION LAB REPORT THE CHANGE IN MASS(±0.005g) OF VARIOUS TYPES OF CORROSIVE METALS WHEN PLACED IN A SOLUTION OF 1 MOLAR CONCENTRATION OF HYDROCHLORIC ACID OVER A PERIOD OF 8 DAYS AT AN AVERGAE ROOM TEMPERATUR OF 24 DEGRESS CELCIUS. Research Question: Does the mass(±0.005g) of various types of corrosive metals (iron‚ nickel‚ zinc‚ copper and tin) change when placed in a solution of 1 molar hydrochloric acid over a period of 8 days at an average room temperature of 24 degrees Celsius? Aim:
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In part one of my project you learned about how salt affects the freezing point of water. In my science project I wanted to see if salt affected the freezing point of water. I started by doing some experiments. My first experiment was whether tap water or salt water would freeze first. I first started by mixing up the salt water warming it for one minute and warming the tap for one minute also. My second experiment was what ice cube would melt fastest. I started by getting two bowls. Two ice cubes
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Making Molar Solutions and Dilutions Objectives: After performing this lab‚ the student should be able to: • Calculate grams of solute and correctly prepare a molar solution. • Prepare parallel and serial dilutions using C1V1 = C2V2 • Distinguish a parallel dilution from a serial dilution. • Determine whether a parallel or serial dilution should be used in a given situation. • Use a microcentrifuge to make a pellet. Making Molar Solutions and Dilutions A major job of any biotechnician
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