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Why would it be better to add a small amount of a high molarity Hydrochloric acid into a eudiometer, followed by filling the remainder up with water rather than filling the whole thing up witha lowe
If a molecule of HCl diffuses a certain distance in 3700 s, how long (s) would it take a molecule of NO to diffuse the same distance at the same temperature and under the same conditions?
If you stacked Avogadro's number of pennies one on top of theother on Earth's surface, how far would the stack extend (inkm )? [For comparison, the sun is about 150 million km from Earth and the nea
The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1.A sample of sodium fluoride produced 28.1g of sodium upon decomposition. How much fluorine (in grams) was formed?
Describe the 5 traits that characterize modern vascular plants.Explain how these characteristics have contributed to their successon land.
Lithium would be the least expected to undergo a reaction with chlorine gas. Write a balanced chemical equation for the reaction.Express your answer identify all the phases.
Calculate the solubility of carbon dioxide in g/L at 20C in a closed container of water if the partial pressure of CO2(g) is 3.6atm. Henry's constant is 0.023 mol/L atm for Co2(g) at 20C.
Benzene (C6H6) burns in air to producecarbon dioxide and liquid water. Calculate the heat released (inkilojoules) per gram of the compound reacted with oxygen.
Given that the heat of fusion of water is -6.02 kJ/mol, that the heat capacity of H2O(l) is 75.2 J/mol K and that the heat capacity of H2O (s) is 37.7 J/mol K, calculate the heat of fusion of water
A solution of acetic acid isprepared in water by adding 11.1g. of sodium acetate to a volumetric flask and bringing the volume to 1.0L with water. The final pH is measured to be 5.25.
An excited hydrogen atom with an electron in the n = 5 stateemits light having a frequency of 6.90 x 10^14 s^-1. Determine the principal quantum level for the final state in thiselectronic transiti
How many collisions does a single Ar atom make in 1.0 s when the temperature is 25 degrees Celcius and the pressure is (a) 10 atm, (b) 1.0 atm, (c) 1.0 μatm?
A 1.0 dm^3 glass bulb contains 1.0 x 10^23 H2 molecules. If the pressure exerted by the gas is 100 kPa, what are (a) the temperature of the gas, (b) the root mean square speeds of the molecule
The element indium exists naturally as two isotopes.113In has a mass of 112.9043 amu, and 115In has a mass of 114.9041 amu. The average atomic mass of indiumis 114.82 amu. Calculate the percent
Ammonium chloride , NH4, is a very soluble salt . 300g of ammonium chloride is dissolved in 600 ml of what . What is the molar concentration of the solution?
The objects volume is determined by displacement of water in a 100mL measuring cylinder (±5%): the volume reading before the object is immersed is 52.4mL, and after immersion the reading is 8
If a pentapeptide was found having the amino acidsPhe,Gly,Met,Ala, and Ser. N-terminal analysis yielded the PTH derivative of alanine. Partial hydrolysis of the pentapeptideyielded the dipeptides Gl
Zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas. How many milliters of 3.00m HCI are required to react with 12.35 g of zinc?
Lakes in the Adirondack mountains of New York state areparticularly susceptable to acid rain. One strategy that has been suggested to overcome the acidification of these lakes is to peridocally add
Given that the world's oceans contains 1.35 x10^9 km^3 of water, determine the mass in grams.. show how to obtain converstion factors from km^3 to m^3, and from m^3 to cm^3. Use 1.03 g/cm^3 as
A sample of hydrated copper(II) sulfate (CuSO4nH2O) is heated to 150 degrees centigrade and produces103.74 g anhydrous copper (II) sulfate and 58.55g water.
It has been estimated that the concentration of CO2 inthe atmosphere before the industrial revlution was about 275ppm. If the accumulation of CO2 in the atmospherecontinues, then by the midd
A chemical is placed in a beaker containing 20g. of soil and500ml of water. At equilibrium, the chemical is found in thesoil at a concentration of 100 mg*kg-1 of soil.
A sample of neon gas at a pressure of 1.08 atm fills a flask with avolume of 250 mL at a temp of 24.00C. If the gas istransferred to another flask at 37.20C and a pressure of2.25 atm, what is the v
The second virial coefficient of methane can be approximated by the empirical equation: B'(T) = a + b*exp(-c/T^2), where a =-0.1993 bar^-1, b = 0.2002 bar^-1, c = 0.1131 K^2 with 300 K < T< 6