Chemistry Quiz June 7‚ 2010 Name:_________________________________________ Score:______ 1. A sample of gas occupies a volume of 7.50 L at 0.988 atm and 28.0 °C. (a) Calculate the pressure of the gas if its volume is decreased to 4.89 L while its temperature is held constant. (b) At what temperature in degrees Celsius is the volume of the gas 4.0 L if the pressure is kept constant. 2. Calcium carbonate‚ CaCO3(s)‚ decomposes upon heating to give CaO(s) and CO2 (g). A sample of CaCO3
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AND MATERIALS : Glass trough‚ gas jar stand‚ metre ruler‚ candle‚ marker pen‚ matches‚ plasticine. Figure 1 VARIABLE : i. kept constant : the size of the candle ii. manipulated : the amount of oxygen inside the gas jar iii. responds : the level of water in the gas jar PROCEDURES : 1. Use some plasticine to fix a candle to the gas jar stand in the trough. (Make sure that the length of the candle is nearly half the length of the gas jar. 2. Fill the trough with
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The Lab Report‚ Significant Figures & Working with Numbers CHMY 142-18 Experiment 1 September 4th‚ 2009 Introduction: This experiment is dealing with the relative accuracy of an individual measurement. Data will be provided to perform the calculations asked for. The purpose of this experiment is to know how to use significant figures and to get formularized with making proper laboratory reports. Procedure: Use the data table’s information to solve the missing
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behind the small slug it should remain above the speed of sound in diamond until (20Kg*4000Km/s/15km/s) the total mass of matter it has punched through reaches 5.3 tonnes. Second‚ things heat up when they are compressed as given by the perfect gas law (at these energy densities it is close enough for our purposes despite everything bieng solid) so when the projectile gets compressed it heats up‚ if it heats up to the correct level it melts‚ vaporizes and turns into plasma‚ that depends on the energy
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Assume that the lung gases are saturated with moisture at a body temperature of 37°C. Calculate the partial pressure of inert gas (mostly nitrogen) in the climbers’ lungs. 72. During a collision‚ automobile air bags are inflated by the N2 gas formed by the explosive decomposition of sodium azide‚ NaN3. 2NaN3 --> 2Na + 3N2 What mass of sodium azide would be needed to inflate a 25.0-L bag to a pressure of 1.40 atm at 25°C?
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condition. • Seal Gas Skid: Always Charge gas through gas filters GT-F8102 and fill the system. This prevents dirty gas going to seals. • Always maintain barrier seal pressure @ 0.3to 0.5 atg on OTB side and TB side before start of the Lube oil Pump and during normal operation. • Open the suction valve HIC 8001 only after the system is filled with gas and reaching the suction pressure. • Open the discharge valve GTV 8002 before starting of compressor as seal gas to compressor is
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Common Name: Pearl Scientific Name: Calcium Carbonate Formula: CaCO3 Fundamental particles: Pearls are comprised of a positive Calcium ion (Ca+) and a negative Carbonate polyatomic ion (CO3+) Usage: Jewelry Properties: Pearls are good jewelry because they are hard and lustrous. Pearls are hard because of the strong Intermolecular forces created between the Calcium and the Carbonate ions. The pearls luster is dependent on the amount of nacre excreted. The Oyster produces nacre when
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05_CTR_ch14 7/12/04 8:13 AM Page 351 Name ___________________________ 14.3 Date ___________________ Class __________________ IDEAL GASES Section Review Objectives • Compute the value of an unknown using the ideal gas law • Compare and contrast real and ideal gases Vocabulary • ideal gas constant (R) • ideal gas law Key Equation • Ideal gas law: P V n R T or PV nRT Part A Completion © Pearson Education‚ Inc.‚ publishing as Pearson Prentice Hall. All rights
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molecular considerations‚ identify which intermolecular interactions are significant (including estimating relative strengths of dipole moments‚ polarizability‚ etc.) • Apply simple rules for calculating P‚ v‚ or T ◦ Calculate P‚ v‚ or T from non-ideal equations of state (cubic equations‚ the virial equation‚ compressibility charts‚ and ThermoSolver) ◦ Apply the Rackett equation‚ the thermal expansion coefficient‚ and the isothermal compressibility to find v for liquids and solids • State the molecular
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Practical 6 -Determining the Gas Constant Aim: To verify the gas constant as 8.31 J/mol/K ( ) and to calculate the molar mass of butane. Theory: The ideal gas law‚ PV=nRT‚ is used to model an ideal gas‚ which is a gas with no intermolecular forces other than those of collisions‚ perfectly spherical and elastic particles. Although an ideal gas is a theoretical model and so cannot exist in practice‚ most gases behave fairly similarly to an ideal gas. Gases behave more like an ideal gas when they are at a higher
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