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a 0.755 g sample of hydrated copper (II) sulfate was heated carefully until it had changed completely to anyhydous copper(II) sulfate (CuSO4) with a mass of 0.438 g. Determine the value of x. [This number is called the number of waters of hydration of copper (II) sulfate. It specifies the number of water molecules per formula unit in the hydrated crystal.]
Two gas reservoirs, A and B, have the same volume and contain gas at the same temperature. Reservoir A contains 7.62g of He gas at a pressure of 1.20atm. Reservoir B cotains Ne gas at a pressure of 1.80atm. Determine the mass of Ne gas in containe..
A certain ionic lattice consists of a ccp sublattice of cations. The anions occupy all of the tetrahedral sites. What is the empirical formula of the compound
a sample of pure no2 is heated to 336 degree celsius at which temperature it partially dissociates according to the
calculate the mass of propylene glycol rmc3 rmh8 rmo2 that must be added to 0.340 kg of water to reduce the vapor
what are the electronic configurations of Pb and Pb2+, also Mo and Mo2+. please explain what are their valence electrons.
Calculate the pH of a buffer solution prepared by dissolving 4.3 g of NaHCO3 and 5.5 g of Na2CO3 in 0.20 L of water.
What is the hybridization of the nitrogen atom in sulfathiazole, and assuming the sulfur atom is sp2 hybridized how many electrons are there in the sulfathiazole ring
When are covalent bonds most likely to form? a. between 2 atoms with a high ionization energy b. between 2 with a low ionization energy. c when one atom high and other low d. no correct choice. (I'm leaning towards a.)
Which type of transition (isothermal, isobaric, adiabatic, or isovolumetric) describes what happens when the canister is moved from the cold water bath to the hot water bath. Explain
Molecular mass of a sample of 0.299 g of a gas in a 0.220 L bulb under a pressure of 0.757 atm and at a temperature of 250 C
The amino acids found in proteins are all alpha-amino acids, but not all amino acids are alpha-amino acids. Suppose that a particular amino acid has alpha -, beta-, and gamma isomers. Which of the following will be the strongest acid
the anharmonicity constant is 117.90 cm^-1. Calculate the frequency at which the Q branch for the first overtone will be found.?
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