Master Chemistry with Fun Quizzes & Brain Teasers!

A gas mixture of xe and ar has a total pressure of 12.20 atm. what is the mole fraction of xe, if the partial pressure of ar is 4.50atm?
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Consider the following reaction:4 NH3 + 3 O2 2 N2 + 6 H2OIf the rate of formation of N2 is 2.00 mol L-1 s-1, the rate at which NH3 reacts is:
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Identify a problem of human impact on the environment that could be solved through designing a device or process. A. Define the problem. B. Identify who would be helped by solving this problem. C. List the criteria and constraints of the problem. D. Brainstorm at least two possible solutions to the problem
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Neon leaks out of a container in 15. 0 minutes. The same amount of an unknown gas will leak out in 21. 2 minutes under identical conditions. What is this unknown gas? *
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How many moles of O2 are needed to fully combust 5. 67 moles of C4H10? C4H10(l) + O2(g) CO2(g) + H2O(l)
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What is the temperature of a gas at 100 kPa if the gas had a temperature of26C at 200 kPa?
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What is mean by region of postive slope on the heating curve of water
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How many moles are in 98. 3 grams of nickel(III) phosphate
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Complete the sentences to explain whats happening at different portions of the heating curve. particles of the substance have the most kinetic energy when the substance is . the part of the graph that represents where the substance has the least amount of potential energy is labeled .
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Identify each bond between the component atoms as sigma bonds (single bonds), one sigma bond and one pi bond (double bonds), or one sigma bond and two pi bonds (triple bonds)
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Place the following atoms in order of increasing atomic radii: se, sb, br, and te
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4. 3 moles of a gas are at a temperature of 28C with a pressure of 1. 631 atm. What volume does the gas occupy?
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Zn (s) + 2Ag(NO3) (aq) 2 Ag (s) + Zn(NO3)2 (aq)How many grams of zinc are needed to fully react with 8. 0 moles of silver nitrate?
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Is Valparaiso warmer, colder, or the same temperature as Sydney? Explain why as completely as you can
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Calculate the root mean square velocity for the N2 gas at 11. 8 degree celcous (R=8. 3145 JK-1 mol-1)
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If you have 16 moles of o2 in a balloon what is the volume of oxygen in the balloon
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A sample of helium gas occupies 12. 4 L at 23C and 0. 956 atm. What volume will it occupy at 1. 20 atm assuming that the temperature stays constant?
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If the final pressure in a container is 6. 10 atm and the volume changes from 2. 5 L to 3. 7 L, what is the original pressure?Your answer:9. 028 atm1. 51 atm0. 66 atm4. 12 atm
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An object in motion stays in motion and an object at rest stays at rest until ?
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1.when someone says, "i have a theory that excess salt causes high blood pressure," does that person really have a theory? if it is not a theory, what is it?
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How many degrees will the air temperature be different in 2050 from the air temperature in 2000? (Your answer should be a number or range of numbers. )
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What is the ph of a solution prepared by mixing 30.00 ml of 0.10 m ch3co2h with 30.00 ml of 0.030 m ch3co2k? assume that the volume of the solutions are additive and that ka = 1.8 x 105 for ch3co2h.
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how many periods are there in a periodic table of elements
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Engineers designing a new energy efficient product will make the first model called a
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