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Determine the value of Keq for Ca3(PO4)2 (Ksp=2.0*10-33) dissolving in acid solution, given that Ka2=6.17*10-8, Ka3=4.79*10-13 for H3PO4.
How much heat is required to warm 227 g of ice from -44.5°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C.
Determine which species is present in the lowest concentration in 0.10 M H3A solution?
a total of 2.00 of a compound is allowed to react with water in a foam coffee cup and the reaction produces 193 of
What is the pH of a solution obtained by adding 5.00 g of HI to 295 mL of a 0.786 M solution of nitric acid?
given the mass of chlorine as 26.0g and mass of aluminium as 31.0g. if you had excess chlorine how many moles of of
acetic acid has a Ka value of 1.8x10^-5. How many grams of NaC2H3O2 would have to be added to 100 ml of .1 M HC2H3O2 to prepare a buffer with a pH of 4.5?
An electron in an excited state of a hydrogen atom emits two photons in succession, the first at 1281 nm and the second at 102.5 nm, to return to the ground state (n=1).
Given Keq=kr/kf= 0.5 suppose the addition of an enzyme increases kf by a factor of 10^9, (a) calculate Keq for this reaction (b) suppose you add an enzyme that increases Kf by a factor of 10^9, what would Keq be then. What would Kr be
The heat of fusion of acetic acid, the principal organic component of vinegar, is 45.9 cal/g.How much heat (in kilocalories) is required to melt 3.65 mol of solid acetic acid
the reaction of copper(I) sulfide with oxygen gas as follows: Cu2(s) + O2(g) ? 2Cu(s) + SO2(g) If 0.330 kg of copper(I) sulfide reacts with excess oxygen, what mass of copper metal may be produced
A 64 g piece of ice at 0 degrees celsius is added to a sample of water at 9 degrees celsius. all of the ice melts and the temperature of the water decreases to 0 degrees celsius. How many grams of water were in the sample?
what do atoms with a strong attraction for electrons they share with another atom exhibit. What are the formulas for nonpolar covalent compound, polar covalent compound, and ionic compound.
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