Exams & Certification

Sodium benzoateis a product of sodium hydroxide and benzoic acid(). What is the pH of 0.12 M Sodium benzoate? Please enter 3 significant figures (Sample problem 18.12 and follow-up problems) The Correct Answer and Explanation is: Answer: 8.64 Explanation: Sodium benzoate (C₆H₅COONa) is the salt formed from a strong base (sodium hydroxide, NaOH) and a weak […]

Sodium benzoate (C6H5COONa) is a product of sodium hydroxide and benzoic acid (C6H5COOH) (ka = 6.3*10^-5). What is the pH of 0.12 M Sodium benzoate? Please enter significant figures. (Sample problem 18.12 and follow-up problems) QUESTION 6 Determine whether the following salts are acidic, basic, or neutral: NH4Cl (Basic), Sr(NO3)2 (Neutral), KNO2 (Acidic) QUESTION 7

Instructions Which command places the switch in global configuration mode? enable • console • configure terminal if The Correct Answer and Explanation is: Expand to view model thoughtschevron_righteditmore_vert The correct answer is configure terminal. Explanation Network devices such as switches and routers that use a command-line interface (CLI), like Cisco’s Internetwork Operating System (IOS), employ a

The length of a bicycle trail is 1,310 yards. How many miles will Bella and her friends ride if they make 6 trips around the trail? Round your answer to the nearest tenth of a mile, if necessary The Correct Answer and Explanation is: Answer:Bella and her friends will ride 4.5 miles if they make

(LAH) cannot be used to convert carboxylic acids (RCOOH) to the corresponding aldehydes because: ?LAH is not sufficiently reactive. ?RCOOH is converted into RC=O. ?RCOOH is reduced to RCHOH. ?RCOOH is converted into RCOOLI. ?RCOOH is reduced to RCH. The Correct Answer and Explanation is: Correct Answer: RCOOH is reduced to RCH₂OH. Explanation: Lithium aluminum

nine more than the quotient of a number and 8 is equal to 3 Use the variable w for the unknown number. The Correct Answer and Explanation is: Equation:Nine more than the quotient of a number and 8 is equal to 3. Step 1: Translate the words into an algebraic equation.Let the unknown number be

One loopful (10 ul) of plasmid DNA with a concentration of 10 ng/ul was used. The cells were incubated in a total of 500 ul of solution, and 100 ul of this solution was used to inoculate the plate. If the transformation efficiency was supposed to be 1048 colonies/ug, explain whether the transformation was successful.Calculate

Calculating Transformation Efficiency Table 2: Transformation efficiency of E. coli cells transformed with plasmid pUC19 Plate Plasmid DNA Volume Concentration Total DNA Transformation DNA Diluted? of DNA of DNA (ng/μl) used in transformants efficiency added? used transformation (# of colonies) Y or N (M) (ng) LBA n/a n/a LAWN n/a LBA 10 10 ng/μl n/a,

The cell does not need to expend energy (ATP) in order to perform facilitated diffusion (C) pinocytosis (B) osmosis (A) Both A and C are correct active transport (D) The Correct Answer and Explanation is: Correct Answer: (E) Both A and C are correct Explanation: Cells transport substances across their membranes using various mechanisms, which

(a) How many valence electron are in B2+? (b) How many valence electrons of B2+ are in bonding molecular orbitals? (c) How many valence electrons of B2+ are in anti-bonding molecular orbitals? (d) What is the bond order of B2+? (e) If B2+ is a stable chemical species, what is it’s magnetism? (f) What type