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When sodium oxide reacts with water to produce sodium hydroxide how many moleucles of sodium oxide must be used to produce 275 grams of sodium hydroxide?
Iodine-123 is used to study thyroid gland function. This radioactive isotope breaks down in a first-order reaction process with a half-life of 13.1 hours. What is the rate constant for the process?
How does this compare with CH, bond length 1.131 angstroms and dipole moment 1.46D If possible....do the numerical results match qualitatively with differences in electroegativity of C, H, and O?
Describe the bonding of methyl acetylene (propyne)CH3CCH in terms of hybridization. If possible, include diagrams to show the σ & π bonds.
If the fluid inside a tree is about .1M more concentrated in solute than the ground water that bathes the roots, how high will a column of fluid rise in the tree at 25 degrees celcius? Assume that t
What happens when a gas jar containing air is inverted over a gas jar containing brown-red bromine vapour?What is the process called?
Biochemists have discovered more than 400 mutant varieties of hemoglobin, the blood protein that carries oxygen throughout thebody. A physician studying a variety associated with a fataldisease firs
Under what circumstances would you use mized solvents in are crystallization?5. Why do you we keep the volume of the rinses small in the recrystallization procedure?
Biochemist have discovered more than 400 mutant varieties of hemoglobin, the blood protein that carries oxygen throughout the body. A physician studying a variety associated with a fataldisease firs
If a refrigerator door is left open in a room where the temperature is 30 degress C, assuming the room is perfectly insulated, and the refrigerator temperature is set at 10 degree C what will
In the Lewis structure ofHOCH2CH2OH, how many valence electrons need to be shown and how many pairs of electrons are bonding and how many are non-bonding?
3 energy levels designated E9A), E(B), and E(C). The wavelength of the radiation emitted from the transitionE(C)-->E(A) is 500 nm. The wave length of the radiation emitted from transition E(B)--&
A sample of hydrogen gas wascollected over water at 36.0 °C and 862 mmHg. The volume of the flask was 9.50 L. Calculate the number of moles of H2 collected. (Vapor pressure of water at 36.0 °
How many grams of acrylonitrile (C3H3N) would be produced if we began with 15 grams of propene(C3H6), 5 grams of ammonia(NH3), and 10 grams of oxygen?
Calculate the density of fluorine gas at a pressure of225KPa and temperature of 115 degrees celsuis (in g/L)7) 4.50 x 10^3 mL of CH4 at STP is equivalent to how many grams?
Nitrogen gas (N2) reacts with hydrogen gas(H2) to form ammonia (NH3) at 200°C in aclosed container. 1.41 atm of nitrogen gas is mixed with 2.32 atm of hydrogen gas. At equilibrium the total pres
A 0.21 m3 drum contains 100L of a mixture of several degreasing solvents in water. The concentraton of trichloroethylen in the headspace ( gas phase) above the water was measured to be 0.00301
The nuclide hafnium-171 has a half-life of 12.0 hours. What amount of a sample of this nuclide that originally had a mass of 75 mg remains after 3 days?
The first step in the industrial preparation of nitric acid is the production of nitric oxide (NO) from ammonia gas and oxygen gas;the other product is water vapor.
8.69 g of zinc metal is heated in a dry test tube in aboiling water bath to 99.95 °C. The hot zinc metalis then dropped into 98.55 g of water at 20.65 °C in acalorimeter. The mixture of
When excess aqueous ammonia is added to Ni(OH)2 the solid dissolves and the complex ion Ni(NH3)6^2+ is formed. Write the net ionic equation for the rxn.
If an element consisted of three isotopes in the following relative abundance, what would the atomic weight of the element be? this is a hypothetical example.
How much heat is released in the oxidation of 3.68 L of methanol at 1.05 atm and 298 K? Give your answer in kJ (absolute value) to 3 significant figures.
An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 397 nm. What is the value of n for the level to which the electron relaxed?
Calculate the freezing point and boiling point of a solution that contains 50.7 g NaCl and 40.0 g KBr dissolved in 750.3 mL H2O.