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What is the molecular equation, Ionic equation and the Net ionic equation?
The International Union of Pure and Applied Chemistry (IUPAC) has adopted 273.15 K and 1 bar as standard temperature and pressure (STP) for gases. Under these conditions, the molar volume of ideal g
The equilibrium constant for the reaction of S02 (g)+NO2 → SO3(g)+NO(g) is 3.0. Find the amount of NO2 that must be added to 2.6 mol of SO2 in order to form 1.3 mol of SO3 at equilibrium?
If 15.7g of CaCl2 is dissolved in 1.0L of 1.00M NaCl solution (assume no change in volume), what is the molar concentration of the Cl- ions in the resulting solution?
A 0.035 M solution of a monoprotic acid is 13 percent ionized. Calculate the ionization constant of the acid.
Liquid nitrogen has a density of 0.808 g/mL at -196 C. If 440.0 mL of LN2 is injected into a weather balloon to inflate it, what is the final volume of the balloon at 0.96 bar and 20 C?
If a 1.223 g sample of aluminum metal is heated in a chlorine gas atmosphere, the mass of aluminum chloride produced is 6.043 g. Calculate the empirical formula of aluminum chloride.
Calculate the wavelength, in nanometers, of the light emitted by a hydrogen atom when its electron falls from the n=7 to the n=4 principal energy leve.
In an electron microscope, electrons are accelerated to great velocities. Calculate the wavelength, in m, of an electron traveling with a velocity of 7.0 megameters per second. The mass of an electr
A block of dry ice whose mass is 24.4 g sublimes in a room whose temperature is 26.5 oC. What is the entropy change (ΔS) of the CO2?
Calculate the energy of a photon of blue light that has a wavelength of 432 nm.
On a cool, rainy day, the barometric pressure is 730mmHg. Calculate the barometric pressure in centimeters of water (cmH2O). Density of Hg = 13.5g/ml; density of water = 1.00g/ml.
In lab, an isomerization of dimethyl maleate in the presence of bromine to form dimethyl fumarate was conducted using a TLC. One reaction was left to proceed in the light, while the second proceeded
The pressure of 4.90 Liters of an ideal gas in a flexible container is decreased to one- third of its original pressure, and its absolute temperature is decreased by one-half. What is the final volu
Question: When 15 mL of water at 21 C is combined with 11 mL of water at 63 C, what is the final temperature of the water?. The specific heat of water is 4.184 J/g/K and its density is 1.0 g/mL.
Each quarter produced by the U.S. mint is made up of copper and nickel alloy. In each coin there is 0.00740 moles of Ni and 0.0886 moles of copper. What is the total mass of a quarter?
Ca (BrO3)2 determine molar mass for this compound and oxidation number of bromine in it .Write corresponding oxide of bromine,Name these compounds: NaBr, Fe(OH)3, HNO3
A 0.042 M solution of a monoprotic acid is 12 percent ionized. Calculate the ionization constant of the acid.
Write complete ionic and net ionic equation for the following reaction: lithium sulfate and strontium chloride. Express your answer as a chemical equation. Identify all of the phases in your answer.
How can the high electrical and thermal conductivities of metals be explained by "electron gas" model of metallic bonding? Ductility?
Write a balanced molecular equation and a net ionic equation for the reaction of solid aluminum hydroxide with a solution of hydrobromic acid. Include the states of each species
Calculate the titer of the EDTA solution in terms of mg of CaCO3/ml of EDTA.
A certain applications requires a mterial that is lightweight, an electrical insulator, and has some flexibility. Which class of materials would you search for this selection.
Question: Explain how the mass of a single atom in an element (jn amu), the mass of one mole of atoms of that element, and Avogadro's number are related.
Calculate the pH after the following volumes of titrant have been added: 0.00 mL, 10.0 mL, 20 mL, 40.0 mL, 45.00 mL, 50.0 mL.