Chemistry

A helium balloon contains 69.5 L of helium at sea level, where the atmosphere pressure is 101.3 kPa. The balloon is released frim a 4500 m mountaintop where the pressure is 61.7 kPa. What is the volume of the balloon when it takes off from the mountaintop
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if the element xenon applied for a job, what job would it apply for
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Which of these defines a volcano?A.An undersea rift that can cause the ocean floor to moveB.A mountain on Earth's crust through which molten material leaves the mantleC.A large pile of rocks and other debris that turn into liquid when heatedD.An extremely tall collection of liquid metals that harden when cooled
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among the elements given below , the element with the least electronegativity is:I) lithium2) carbon3) boron 4) fluorine
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if the volume and Kelvin temperature are reduced by one-half what will happen to the pressure???
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Which is the most dense: honey, milk, or corn syrup?A. HoneyB. MilkC. Corn syrup
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You arrive in my class 45 seconds after leaving math which is 90 meters away. How fast did you travel?
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5) A solution has a pH of 1.5. What is the [H+]? *0.03160.06790.001230.000954
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The pressure of a gas is 1.35 atm at temperature of 21oC. If the volume and amount of gas is unchanged, what pressure would be needed for the temperature to raise to 36oC?
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A geologist took this aerial photo of a location where a river flows out of a mountain range.What feature is pictured here?alluvial fandeltaflood plainoxbow lake
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Common additives to drinking water include elemental chlorine, chloride ions, and phosphate ions. Recently, reports of elevated lead levels in drinking water have been reported in cities with pipes that contain lead, Pb(s). When Cl2(aq) flows through a metal pipe containing Pb(s), some of the lead atoms oxidize, losing two electrons each, and aqueous chloride ions form. (a) Write a balanced, net-ionic equation for the reaction between Pb(s) , and Cl2(aq).
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2.03Which landform is created by flowing water A.cirquesB.gulliesC.hornsD.dunes
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Please help No Explanation needed. Its science please
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methane Express your answer as a condensed structural formula omitting all bonds (e.g CH3CH2CH3). nothing Request Answer Part B ethane Express your answer as a condensed structural formula omitting all bonds (e.g CH3CH2CH3). nothing Request Answer Part C pentane Express your answer as a condensed structural formula omitting all bonds (e.g CH3CH2CH3). nothing Request Answer Part D cyclopropane Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. Include all hydrogen atoms.
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Consider the nuclear equation below. Superscript 222 subscript 86 upper R n right arrow superscript 218 subscript question mark upper P o plus superscript 4 subscript 2 upper H e. Which is the missing value that will balance the equation? 84 86 88 90
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How many moles of O2 can be produced from 1.7 moles of KClO3?
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A hydrate is typically a crystalline compound in which water molecules are chemically bound to another compound or an element. When CuSO4 5H2O is heated in a crucible, there is a loss of water. How should a student determine the amount of water lost? a.Subtract the mass of the CuSO4 from the mass of CuSO4 5H2Ob.Subtract the mass of the CuSO4 5H2O from the mass of CuSO4c.Add the masses of CuSO4 5H2O and CuSO4d.Multiply the masses of CuSO4 5H2O and CuSO
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What is the molarity of an HCl solution if 125 mL is neutralized in a titration by 76.0 mL of 1.22 M KOH?
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Which of the following would produce the most ions when dissolved in water?sodium chloridemangesium chloridealuminum oxidesugar
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HELPPP TODAY IS THE LAST DAY OF SCHOOL
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water is the only compound that commonly exists in the __ states on the earth
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2HNO (ag) +LMg(s) Mg(NO3)2(s)Helg)155.0-ml of a solution of 0.75 M HNO3 is combined with 270 g of magnesium. Whatvolume of hydrogen gas will be produced at STP?
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When a gas particle changes phase into a liquid particle:A. the particle loses energyB. the particle gains energyC. the particle has no change in energyD. the change in energy depends on the type of gas
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Draw the structure of a compound with the molecular formula CgH1002 that exhibits the following spectral data. (a) IR: 3005 cm-1, 1676 cm-1, 1603 cm-1 (b) H NMR: 2.6 ppm (singlet, I = 3H), 3.9 ppm (singlet, I = 3H), 6.9 ppm (doublet, I = 2H), 7.9 ppm (doublet, I = 2H) (c) 13C NMR: 26.2, 55.4, 113.7, 130.3, 130.5, 163.5, 196.6 ppm ?
1 Answer