Master Chemistry with Fun Quizzes & Brain Teasers!

A gas sample having an initial temperature of 80 and an initial volume of 135 l is cooled to a final temperature of 12 and a final volume of 103 l. if the final pressure of the gas is 1.50 atm, what was the initial pressure?
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At a constant pressure, a sample of gas occupies 420ml at 210k. what volume does the gas occupy at 250k
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Consider the reaction when 0. 40 mol of propane is burned completely with 2. 00 mol oxygen
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Design a concept map that shows the relationship between pressure, volume, and temperature in boyle's charles's and gay-lussac's laws
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How many moles of N2 are in a flask with a volume of 250mL at a pressure of 300. 0kPa and a temperature of 300. 0K?
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The volume of a sample of hydrogen gas at 0. 997 atm is 5. 00 L. What will be the new volume if the pressure is decreased to 0. 977 atm?
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What is the mass in grams of 0.30 mol of nahco3?
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A tractor collides with a car while driving down the road. The car travels at a speed of 25m/s and weighs 1,300 kg. What is the momentum of the car? If the tractor weighs 1,500 kg and traveled at 5 m/s what was the total momentum of the collision?
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Name the property that allow the filter Paper to carry out its function
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What happened to the concentration of the ions as the water evaporates
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Ethylene is burned with 33% excess air. the analysis of the dry base combustion products indicates the presence of 6.06% of 2 by volume. the rest of the results have been lost. what percent of the carbon in the fuel has been converted to instead of 2?
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When ammonium is added to water the temperature of the water decreases. Ammonium nitrates can be recovered by evaporating the water added Which explains those observations A the ammonium nitrates dissolved in water and process is endothermic B the ammonium nitrate reacts with the water and process is endothermic C the ammonium nitrates dissolved in water and process is exothermic D the ammonium nitrate reacts with the water and process is exothermic
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If 84g of urea (CH4N2O) is dissolved in 1400. G of chloroform, what is the elevation in the boiling point? Kb for benzene is 2. 67 Co/m
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Four quantum numbers of the last electron of Ca^2+
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How can you determine the specific heat capacity of 1. 0g of yam
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1A 0. 205 g sample of CaCO3 (Mr = 100. 1 g/mol) is added to a flask along with 7. 50 mL of 2. 00 M HCl. CaCO3(aq) + 2HCl(aq) CaCl2(aq) + H2O(l) + CO2(g)Enough water is then added to make a 125. 0 mL solution. A 10. 00 mL aliquot of this solution is taken and titrated with 0. 058 M NaOH. NaOH(aq) + HCl(aq) H2O(l) + NaCl(aq)How many mL of NaOH are used?
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How many moles of ammonia are produced when 4. 8 moles of nitrogen react with hydrogen? N2 + 3H2 2NH3
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Calculate the mass (amu) of 75 atom of AL
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the process in which an atom or ion experiences a decrease in its oxidation state is _____________.
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2) If a solid line represents a covalent bond and a dotted line represents intermolecular attraction, which of the choices shows a hydrogen bond?HHH3NHOHH3NHOHH4CHFH4CHFH2OHCH3
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how many atp molecules are produced by metabolism of an acetyl coa molecule?12 ATP molecules13 ATP molecules14 ATP molecules15 ATP molecules
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For an ideal gas, classify the pairs of properties as directly or inversely proportional. Directly proportional Inversely proportional Answer Bank
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The sequence of amino acids was controlled by the information in the BLANK molecules. (Fill in the blank)
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Part APredict the sign of the entropy change, S, for each of the reaction displayed.Drag the appropriate items to their respective bins.HelpResetAg+(aq)+Cl(aq)AgCl(s)2KClO3(s)2KCl(s)+3O2(g)2N2O(g)2N2(g)+O2(g)2Mg(s)+O2(g)2MgO(s)C7H16(g)+11O2(g)7CO2(g)+8H2O(g)H2O(l)H2O(g)PositiveNegativeSubmitHintsMy AnswersGive UpReview PartPart BCalculate the standard entropy change for the reaction2Mg(s)+O2(g)2MgO(s)using the data from the following table:SubstanceHf (kJ/mol)Gf (kJ/mol)S [J/(Kmol)]Mg(s)0.000.0032.70O2(g)0.000.00205.0MgO(s)-602.0-569.627.00Express your answer to four significant figures and include the appropriate units.S =
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