Exams & Certification

What is the formula of the conjugate acid of dimethylamine, (CH3)2NH? What is the formula of its conjugate base? Trimethylamine has a similar structure to dimethylamine; why does it not have a conjugate base? The correct answer and explanation is : The formula of the conjugate acid of dimethylamine ((CH_3)_2NH) is ((CH_3)_2NH_2^+) (dimethylammonium ion).The formula […]

Dimethylamine, (CH3)2NH, is a weak base ( Kb = 5.4 x 10?4). What is the pH of a 0.50 M solution and what is the percent dissociation?A) 12.2, 3.2%B) 0.016, 3.2%C) 8.5, 6.3 x 10?4 %D) 1.8, 3.2%E) 5.5, 6.3 x 10?4 % The correct answer and explanation is : To determine the pH and

The first step in the segmentation process is to a. use a particular method or methods to segment the market. b. identify and develop a positioning strategy. c. select a target market. d. evaluate the segment’s attractiveness. e. articulate the vision or objectives of the company’s marketing strategy clearly. The correct answer and explanation is

What is the atomic mass of B if 19.9% of all B atoms have a mass of 10.01 amu and 80.1% have a mass of 11.01 amu? A) 10.21 amu B) 10.50 amu C) 10.63 amu D) 10.81 amu The correct answer and explanation is : To calculate the atomic mass of boron (( B

On a hypothetical relative mass scale, the average mass of the atoms of element A was assigned a value of 64.00 gigs. The average mass of the atoms of element B is 36.40% that of element A, and the average mass of the atoms of element C is 6.43 times the mass of A. What

Which of the following gases has the greatest Henry’s law constant in water at 25°C: CH4, Ne, HCl, H2? The correct answer and explanation is : Among the gases listed—methane (CH₄), neon (Ne), hydrogen chloride (HCl), and hydrogen (H₂)—hydrogen chloride (HCl) has the greatest Henry’s law constant in water at 25°C. Henry’s law describes the

Logistics management is important to an organization because: a) Typically, 50% to 75% of an organization’s costs are attributed to logistics. b) Offshoring of services is increasing c) Its primary role is managing inbound logistics d) Logistics affects customer service. The correct answer and explanation is : Correct Answer: d) Logistics affects customer service. Explanation:

Physician odered dose: Amoxicillin 0.8 g every 6 hours dose available: amoxicillin 400 mg /tablet How many tablets should be given for five days? The correct answer and explanation is : Calculation of Amoxicillin Dosage Step 1: Convert grams to milligrams Since 1 gram (g) = 1000 milligrams (mg):0.8 g = 800 mg Step 2:

The following groups were originally opposed to FERPA: School principals and college student political groupsState and local police departmentsSchool counselors and university administratorsStudents in colleges located in the western United States The correct answer and explanation is : The correct answer is: School counselors and university administrators. The Family Educational Rights and Privacy Act (FERPA),

Physician ordered dose: Pentamidine 3mg/kg daily Dose available: pentamidine 60 mg/mL How many mL should be administrated for a child, weight 88 lb? The correct answer and explanation is : Calculation of the Dose Final Answer: The correct dose to administer is 2 mL of Pentamidine 60 mg/mL. Explanation Medication dosage calculations are crucial in