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If you have 50 ml of a buffered solution of 0.15M HNO2 and 0.05M NaNO2, how many ml of 0.2M HCl can you add before the pH changes significantly?
Determine the numbers of electron pairs (both bonding pairs and lone pairs) on the iodine atom in the following.
A certain lead-sulfur compound contains 86.59% Pb by mass and the remainder is sulfur. What is the empirical formula of the compound
What is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? Calculate the wavelength of the 4 ---> 3 transition.
Calculate the final temperature of a mixture of 170.0 g of ice initially at -7.0 degrees C and 318.0 g of water initially at 94.0 degrees C.
Include all reaction steps, a detailed mechanism and all reagents necessary. Make a note of any special purification steps if necessary. Synthesize 1,3,5-tribromobenzene from benzene or toluene.
1.201 g of a solid white acid are dissolved in water and completely neutralized by the addition of 28.41 mL of 0.418 M NaOH. Calculate the molar mass of the acid, assuming it to be a monoprotic acid.
A 100.0ml sample of 0.100M methylamine(CH3NH2, kb=3.7x10-4) is titrated with 0.250M HNO3. Calculate the pH after the addition of each of the following volumes of acid. a) 0.0 ml b) 20.0 ml c) 40.0 ml d)60.0 ml
Sulfuric acid (H2SO4) is prepared commercially from elemental sulfur using the contact process. In a typical sequence of reactions, the sulfur is first burned
assume that the unshaded spheres in the buret represent h ions the shaded spheres in the flask represent oh- ions and
We know Pro can interrupt an a-helix, chemically, do you think it will cause any unusual problems in the determination of, angiotension II sequences? Explain.
For the reaction A --> B, the activation energy is Ea = 125 kJ/mol and the heat of reaction, H = 50 kJ/mol. What is Ea for the reverse reaction in kJ/mol?
If 200 ml of gas at 400 torr is transferred to a 20.0 ml cotnainer. What will the new pressure be if the temperature is kept constant?
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