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Problem- A lab assistant needs to prepare 2000 mL of 0.15 M NaCl. How many grams of NaCl are required to prepare this solution?
My foremost issue is that I think I have to have a balanced reaction in order to do the calculations.
What chemical tests might be used to ditinguish between pentanal and 2-pentanone; between benzyl alcohol and diphenylmethanol?
the ph of a finished water from a water treatment process is 10.74. what amount of 0.02000 n sulfuric acid in
A physiological saline solution is 0.92% sodium chloride (NaCl) by mass and has a density of 1.005 g/mL. What is the osmotic pressure of such a solution at body temperature of 37 degree C
What is the pH of a buffer that results when .50 mole of H3PO4 is mixed with .75 mole of NaOH and diluted with water to 1.00 L . The Ka1 is 7.5*10^-3, Ka2=6.2*10^-8 and Ka3*10^-13. Why is 6.2 *10^-8 used
a buffer is made using 45.0 ml of 0.750 m hc3h5o2 and 55.0 ml of 0.700 m nac3h5o2. what volume of 0.10 m naoh must be
How much HCl is produced from the reaction of an excess of HSbCl4 with 3 moles H2S in the following reaction? HSbCl4 + H2S ! Sb2S3 + HCl
Calculate the number of moles of the base. Calculate the molarity of the acid solution.
In a laboratory 6.80g of Sr(NO3)2 is dissolved in enough water to form 0.450L of solution. A 0.120L sample is withdrawn from this stock solution as well as titrated with a 0.0300M solution of Na2CrO4.
A solution of the weak acid formic acid (HCOOH) has a pH of 2.14 when the concentration of formic acid is 0.30M. What is the numerical value of the acid ionization constant (Ka), and what is the percent ionization of the formic acid
What is the minimum flow rate of water (? = 0.990 g/mL) required to scrub out 90.0% of the incoming NH3? What is the mole fraction of NH3 in the scrubbed waste gas stream?
The latent heat of vaporization of water is 577 J/kg. If a person's body needs to lose 345 J of energy through sweating, how many kilograms of water in the form of sweat must be evaporated.
Draw the structure of the simple dipeptides gly-ala and ala-gly. Circle the peptide bond in each structure.
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