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Question - The latent heat of fusion of water at 0oC is 335 kJ/kg. How much does the entropy of 1 kg of ice change as it melts into water in each of the following ways:
(a) Heat is supplied reversibly to a mixture of ice and water at 0oC.
(b) A mixture of ice and water at 0°C is stirred by a paddle wheel.
A gaseous mixture of and has a density of 1.104 at 445 and 300 . What is the mole percent in the mixture?
The vapor pressures of pure benzene and pure toluene at 25 C are 94.2 torr and 28.4 torr, respectively. Assuming ideal behavior
Question- What is the effect of pH on the solubility of calcium carbonate. Why is this the case. Explain this using the equilibrium curves for calcium carbonate.
How many nucleons does the most abundant isotope of the atom in Period 3, Group IIIA contain, if it is assumed that there are only two naturally-occurring isotopes separated by one nucleon? Express your answer as an integer.
a 0.421-g sample of asprin prepared in ther laboratory isdissolved in 95 ethanol diluted with water and titrated to
What is the concentration of the sodium ion (in M) in a solution of 0.681 M sodium chloride
solid carbon dioxide co2 dry ice goes directly from solid to gaseous state at -78degc. the molar heat of sublimation is
Phenylephrine is a nasal decongestant and is the active ingredient in Sudafed, which contains phenylephrine hydrochloride (PEHCL). The conjugate acid (PEH+)
Methane (CH4) and the perchlorate ion (ClO4-) are both described as tetrahedral. What does this indicate about their bond angles? The NH3 molecule is trigonal pyramidal, while BF3 is trigonal planar.Which of these molecules is flat?
Assuming air is made up of 20% oxygen gas and 80% nitrogen gas, what molecules form when air is heated to 20,000K
Observe the d-orbitals on a central metal and use the character table to derive their irreducible representations (remember which column to look at). Circle any that are nonbonding for sigma interactions.
a solution is prepared by adding 40.3 g of Mg(NO3)2 to 127 g of water. Calculate the mole fraction and molality of magnesium nitrate in this solution
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