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Give the formula for an ionic compound formed from the following pairs of ions. (the dashes below are negative signs) They each need their own formulas.
Na and O2-
Al3 and F-
Mg2 and S2-
Ca2 and P3-
An unknown gas composed of homonuclear diatomic molecules (its structure is X2) diffuses at a rate that is 1.07 times that of O2 at the same temperature. What is the identity of the unknown gas
What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 19.0 L of water to produce an antifreeze solution with a freezing point of -34.0°C
Will a precipitate form when a solution of sodium acetate and a solution of ammonium sulfate mix and what is the net ionic equation that describes the chemical change. what about for a solution of calcium chloride and a solution of mercury (I) nit..
Ethanol has a heat of vaporization of 38.56 kJ/mol and a normal boiling point of 78.4 C What is the vapor pressure of ethanol at 16 C
Reaction of the original polypeptide with CNBr produced two tetrapeptides. Reaction of one of these tetrapeptides with Edmans reagent followed by hydrolysisyieled a PTH derivative with a (CH2)4-NH3
KOH are diluted to 1L to give the same species produced by Al(OH)3. Write mass balance equations for aluminum and potassium.
at room temperature 20 degrees celsius milk turns sour in about 64 hours. in a refrigerator at 3 degrees celsius milk
Write the reaction of benzoic acid with propylamine. If there is no reaction
The rare earth metal terbium is produced from terbium (III) flouride and calcium metal by a single replacement reaction. Given 27.5 g of terbium (III) flouride and 6.96 g of calcium, what is the theoretical yield (in grams) of terbium
What is the wavelength of the electrons emitted by the titanium surface, in nm?
hydrogen gas was collected over water in a eudiometer at 26 degrees c when the atmospheric pressure was 726 mm hg. What was the pressure of the hydrogen gas?
Assume that the following terpenoid is derived biosynthetically from isopentenyl diphosphate and dimethylallyl diphosphate, each of which was isotopically labeled at the diphosphate-bearing carbon atom (C1). Click on the carbons that would be isot..
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