Exams & Certification

CHEM 3401 Pre-Laboratory Assignment: Melting Points (Day Melting Point Experiment) Questions at the beginning of the lab period: 1. Reading Assignment from Nichols, 2nd Edition (Folio): Pages 307-323 – Recrystallization and Melting Point Experiments Laboratory Manual 2. What information is recorded from the melting point of a solid sample? 3. How much solid should be […]

Save After determining that someone has had too much to drink, there are eight steps you should take to cut someone off. What is the first step? The Correct Answer and Explanation is: Correct answer:The first step is to evaluate the situation. Explanation:When you suspect someone has had too much to drink, your first responsibility

CHM 109 Fall 2020 General Chemistry Laboratory | Pre-Lab Assignment 11: (10 points) Name: Please answer the following questions clearly and concisely using English sentences, math equations, pictures, and diagrams as necessary. The objective is to convey your thoughts as clearly, yet briefly as possible. You may either print this out and complete it on

What is equilibrium? when there are no forces when all forces acting on an object remain the same when an object does not move when the forces acting on an object change The Correct Answer and Explanation is: Correct answer: When all forces acting on an object remain the same. Explanation: Equilibrium refers to a

Is Salt water a compound or a mixture ? The Correct Answer and Explanation is: Correct Answer: Salt water is a mixture. ExplanationSalt water is classified as a mixture rather than a compound. A mixture is formed when two or more substances are physically combined without undergoing a chemical reaction. In the case of salt

If the percentage yield is above 100%, what does that mean for your experiment? What possible errors could have occurred that resulted in a percentage yield above 100%? The Correct Answer and Explanation is: Correct Answer:A percentage yield above 100% means that the actual yield from the experiment is greater than the theoretical yield. This

Can an object be in mechanical equilibrium if it’s MOVING? Explain why or why not The Correct Answer and Explanation is: Correct Answer:Yes, an object can be in mechanical equilibrium even if it is moving. Explanation:Mechanical equilibrium refers to the state in which the net force and net torque acting on an object are both

I moved easily along the berth. I felt for the window ledge (compound sentence) The Correct Answer and Explanation is: Correct compound sentence:I moved easily along the berth, and I felt for the window ledge. ExplanationA compound sentence is a sentence made up of two or more independent clauses joined by a coordinating conjunction such

Pressure conversions: 1) What is the absolute pressure in psia equivalent to 150 psig? 2) What is the gauge pressure equivalent to 90 psia? 3) What is the equivalent of 75.2 psi when reported in kPa? 4) What is the equivalent of 15.0 in Hg when reported in psi? The Correct Answer and Explanation is:

Sufficient intake of folic acid helps to prevent defect of which body system in the developing fetus? Hepatic Cardiac Respiratory Neural tube Confident The Correct Answer and Explanation is: Correct answer: Neural tube Folic acid, also known as vitamin B9, plays a critical role in the development of the neural tube in a fetus during