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Question- Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of sodium cyanate (NaCNO) and 1.0 mole of cyanic acid (HCNO) in enough water to make 1.0 liter of solution. [Ka(HCNO) = 2.0 × 10-4]
Answer all three questions and provide required steps
A solution made up of 8.25 g of caffeine and 100.0 mL of benzene (d=0.877 g/mL) freezes at 3.03 C. Pure benzene (Kf=5.10 C/m) freezes at 5.50 C. What are the simplest and molecular formulas for caffeine
a solution of ethanol c2h5oh in water is prepared by dissolving 57.0 ml of ethanol density 0.79 gcm3 in enough water
calculate the molarity (M) of the solution when water is added to prepare each of the following: a)25.0 mL of a 18.0 M HCl solution is diuted to 500 mL. b)50.0 mL of a 1.50 M NaCl solution is diluted to 125 mL. c)4.50 mL of a 8.50 M KOH solution i..
HF has an acid ionization constant Ka =3.5x10-4 State a chemical equation for this reaction corresponding to this Ka
Question- Magnesium has three naturally occurring isotopes, 24Mg (isotopic mass 23.9850 amu, abundance 78.99%), 25Mg (isotopic mass 24.9858 amu, abundance 10.00%), and 26Mg (isotopic mass 25.9826 amu, abundance 11.01%). Calculate the atomic mass o..
25 mL of 0.3 M HCl are diluted to 500 mL. What is the molarity of the resulting HCl solution.
Iodine-131 is a radioactive isotope. After 7.00 days, 54.7% of a sample of 131I remains.
Show how butyric acid can be synthesized from 1-propanol. Do not use a metalloorganic reagent. You will need more than one reaction. Draw beta-aminobutyraldehyde and give its systematic name.
KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate H of this reaction per mole of H2SO4 and KOH reacted.
Calculate the pH at the equivalence point for the titration of .25 M CH3COOH with M NaOH.
Most community water supplies contain 0.5 ppm chlorine added for purification. What mass of chlorine must be added to 1500. L of water to reach this level. (Hint: the density of water is 1.00 g/mL)
the carbon-carbon bonds would be alternately long and short. However, to consider the structures as resonance contributors (or to connect them by a double-headed arrow) violates a basic principle of resonance theory.
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