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A 5.60 -g sample of a weak acid with Ka=1.3×10-4 was combined with 4.80 mL of 5.80 M NaOH and the resulting solution was diluted to 750 mL. The measured pH of the solution was 4.20.
What is the molar mass of the weak acid?
A solution contains 8.88g of KBr in 500.0mL of solution and has an osmotic pressure of 6.97atm at 25 C. Calculate the van't Hoff factor (i) for KBr at this concentration.
How many grams of formic acid, HCOOH, must be added to 0.300 L of 0.190 M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.00? Assume no volume change. Ka of HCOOH = 5.0 10-4.
sodium hydrogen carbonate and sodium chloride are both soluble in water. will a double replacement reaction take place
Measurements on a MOSFET operating in the subthreshold conduction region indicate that the current changes by a factor of 10 for every 80-mV change in vGS and that Id = 20 nA at vGS = 0.16 V. Find the value of iD at Vgs = 0.
What will exactly happen if we use a fluid of low density in manometer than the measuring fluid?
Question- Identify 4 bands/peaks in the IR spectrum of each of the following molecules: 2-phenylbenzothiazole and N-phenylbenzamide diagnostic region and/or fingerprint region. Thank you so much.
How much heat is released when 4.50 g of methane gas is burned CH4 (g) + 2O2(g) -> CO2 (g) + 2H2O(l) H=-890kJ
a 40.0 mass percent solution of ethylene glycol c2h6o2 in water has a density1.0514gml. find the molality
Compare your answers with the following: the effective charges on H and Cl in the HCl molecule are +0.178 and -0.178. A. HBr has a smaller dipole moment and a longer bond length than HCl
A 50.0-mL sample of 0.50 M HCl is titrated with 0.50 M NaOH. What is the pH of the solution after 28.0 mL of NaOH have been added to the acid
The Internet empowers enhanced communication on global, national, and local levels. With all of the positive aspects, by its very design the Internet is very difficult to control and over time various societal and legal issues have arisen. For this w..
At 298K, the osmotic pressure of a glucose solution is 10.50 atm. Calculate the freezing point of the solution if the density is 1.16g/mL.
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