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I. Although electromagnetic energy behaves as both waves and particles, this kind of wave-particle duality is not exhibited by matter.
II. A photon of blue light has a higher frequency and a longer wavelength than a photon of red light.
III. In Bohr's atomic theory, when an electron moves from one energy level to another energy level more distant from the nucleus, energy is absorbed.
a) Ib) IIc) I and IId) All are correct.e) None are correct.
When heated, hydrogen sulfide gas decomposes according to the equation above. A 4.40 g sample of H2S(g) is introduced into an evacuated rigid 1.50 L container. The sealed container is heated to 583 K and 5.72x10^-2 mol of S2(g) is present at equil..
What is the entropy change for the reaction 2H(g) + O2(g)-------- 2H2O(l) at 25 degree and 300 atm
Direct reaction of sodium metal with O2(g) leads to sodium peroxide, Na2O2, which contains a peroxide complex anion and is diamagnetic. Direct reaction of potassium metal with O2(g) leads to potassium superoxide, KO2, which contains a superoxide c..
The specific heat capacity of solid copper metal is 0.385 J/g-K. How many joules of heat are needed to raise the temperature of a 1.55-kg block of copper from 33.0C to 77.5C?
Solid soduim reacts violently with water producing heat hydrogen and sodium hydroxide. How many moeclues of hydrogen gas are formed when 48.7 g of sodium are added to water.
A typical aspirin tablet contains 324 mg of aspirin (acetylsalicylic acid, C9H8O4), a monoprotic acid having Ka=3.0×10?4. If you dissolve 4 aspirin tablets in a 340mL glass of water, what is the pH of the solution and the percent dissociation?
H3PO4 is a tripotic acid with a ka1=7.5x10^-3, ka2=6.2e-8 and ka3=4.8e-13. What is the value of K for H2PO4 PO4^3- + 2H+
compound noradrenaline contains 56.79% C, 6.56% H, 28.37% O, and 8.28% N by mass. What is the empirical formula for noradrenaline?
How much energy (heat) is released when 1.52 moles of H2 reacts with 0.68 moles of Cl2 to create HCl(g) if the ΔHrxn = -184.6 kJ.
Determine how much heat is evolved or absorbed when 30.0 of lithium iodide completely dissolves in water.
Write a chemical equation describing the condensation process for CO2 and a chemical equation describing the freezing process for CO2. For each process discuss the change in enthalpy and entropy that occurs.
a 5.00 ml sample of isopropyl alcohol has a mass of .930 g whe measured at 20 degrees celsius. what is the specific
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