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To prepare 5.75 L of a 1.3 M solution using 800 mL of a stock solution,...
The concentration of hydronium is 3.0 x 10-5 M, what is the POH? HTML Editora BI y A - A - IX E 25 xX, EE Vaba aeg TT 12pt Paragraph O words Question 2 4 pts The concentration of hydroxide is 2.0 x 10-9 M, what us the pH? HTML Editor B 1 0 A A = = = = = x x = = VVDT 12pt Paragraph O words Question 3 4 pts If the concentration of (H+)...
What volume would a constant amount of gas occupy at 290 K if it fills 7.05 L at 270 K? HTML Editor BIVA -A- IX EX X, DE ENVY #VT 12pt Paragraph O words Next → « Previous
In lab, students are asked to prepare solid lead (II) chloride (PbCly) according to the following balanced chemical equation. If there is excess lead (II) nitrate, Pb(NO3)2, solution, then how many grams of lead (II) chloride can be made from 100.0 mL of a 0.425 M sodium chloride (NaCl) solution? Pb(NO3)2 (aq) + 2 NaCl (aq) -- PbCl2 (s) + 2 NaNO3(aq) HTML Editor BIVA L = 三 x 1 12pt Paragraph O words
Question 1 20 pts Please prepare 20 mL of 0.2 M NaOH, given a stock solution of 0.6 M NaOH. State the precise amount of the 0.6 M NaOH used and the amount of diluent (H2O) added Question 2 20 pts Please prepare 500 mL of a 1/100 dilution of serum from a tube with a 1/10O dilution of serum. Please state the volume of the 1/10 dilution of serum used and the volume of diluents (H2O) used 20 pts...
calculate the generation time (minutes/generation) of
4.9*10^6 CFUs/ml
calculate the generation time (minutes/ generation) of
155*10^8 CFUs/ml
for 3hrs 4.9*10^6
for 6hrs155*10^8
The students UR S pes at diferent times during the growth to do dilution plating and get viable plate counts. Here are the results for the samples taken at hours 3 and 6: 3 hours 10 dilution - too many to count 10"dilution - 476 CFUS 10% dilution - 49 CFUS 10 dilution = 5 CFUS 6 hours...
Question 17 8 pts A technician wants to prepare a 1.0% (m/v) silver nitrate (AgNO3) solution from 24.0 mL of 3.0% (m/v) stock solution of AgNO3. a. What is the volume of the solution? (Show all your work !!!!!!!!) b. How much water should be added to the 24 mL of stock solution? (Show all your work !!!!!!) 12pt Paragraph v B I U Av Av T? w Question 18 8 pts What is the molarity of a solution that...
What is the product of the H and OH of a solution with a pH equal to 7? HTML Editori B I VA - A - I E III IX XE VW Polo V 1 12pt Paragraph O words Which of the following is NOT an acid-base conjugate pair? H2CO3 and HCO3- none of the above H20 and OH- H2S and OH- NH4+ and NH3
a) 2.00 (IV) It is desired to prepare 0.250 L of a 0.100 M solution of NaCl from a 1.00 M stock solution. How many mL of the stock solution must be taken for the dilution? (V) What volume of a 0.500 M HCl solution is needed to neutralize 10.0 mL of a 0.300 M NaOH solution. (VI) What volume of 0.416 M Mg(NO3)2 should be added to 255 mL of 0.102 M KNO, to produce a solution with a...
How would you prepare 77 mL of a solution 0.02 M from a stock solution of 1.3 M ? (the volume of the water added is only an estimation. It would be correct if the density of the solution is equal to the density of the solvent, which is never the case, however the error in this case is quite small). V of the stock solution = ? V of water added ≈?
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Part 3: Preparing and testing the carbonic acid/bicarbonate buffer 3) and 6) Buffer 0.1 MHCI A: Buffer A: Buffer B: Butter B: Buffer Part 4: Testing water for pH resistance 2) and 5) DFDFDF A: HO B: H0 Question 6 1 pts pH in Beaker A pH in Beaker B After 5 drops NaOH Solution Initial After 5 drops HCI After 20 drops HCI Initial After 20 drops NaOH Buffer (part 3) Water (part 4) Use the data...