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How is posible that an ionic compund have a positive and negative ions and still have a net charge of zero?
Calculate the pH of a 7.40×10^-1 M aqueous solution of sodium fluoride (NaF). (For hydrofluoric acid, HF, Ka = 7.20×10^-4)
An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 6275 J. What is the specific heat of the gas?
How many different tetrapeptides containing 2 molecules of alanine and 2 molecules of valine could theoretically exist?
Identify the ground state free ion terms with the spin multiplicity for the following cases: Cu2+, V3+, Cr3+, Mn2+, Fe2+, and Ni2+
Write the net ionic equation to show the formation of a precipitate (insoluble salt) when the following solutions are mixed. write none if there is not a precipitate. a)Ca(NO3)2(aq) and Na2S(aq). b)Na3PO(aq) and Pb(NO3)2(aq). c)FeCl3(aq) and NH4NO..
Titanium is a strong, lightweight, corrosion-resistant metal that is used in rockets, jet engines, and bicycle grams. It is prepared by the reaction of titanium (IV) chloride with molten magnesium between 950 and 1150 degrees C via the following r..
What is the volume of 0.2 kmol of ideal carbon monoxide in en equilibrium state where the gas density
a 260- flask contains pure helium at a pressure of 743 . a second flask with a volume of 470 contains pure argon at a
When an acid or a base is added to a buffer, a double-displacement reaction will occur. The acid or base will be neutralized, forming a neutral salt or water plus the conjugate of the buffer.
Calculate the final temperature of 32 mL of ethanol initially at 11 degrees C upon absorption of 562 J of heat.
Write the structural formula for the product that forms when 1-methylcyclopentene reacts with Br2 in H2O
BICINE is a compound that contains a tertiary amino group. You have 0.5 L of 0.05 M BICINE with its tertiary amine in the unprotonated form. How much 0.2 M HCl or 0.2 M NaOH must be added in order to create a BICINE buffer solution pH = 7.5. (pKa ..
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