CHEM 120 Week 3 Exam 1 - Sample Question, Resources
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| Institution | Chamberlain |
| Contributor | Karin Austin |
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CHEM120 Students:
The first exam in your science course is approaching. The General Education Academic Support is here to help. What can you do ahead of Exam 1?
- Attend a live exam review
Thursday, May 12th 6 PM MT Exam 1 Review Join Meeting here: Click here to join
- Watch the recording of an exam review Click here to watch recorded exam review
- Schedule a 1:1 appointment with a tutor Click here to book
- Review the topic videos from weeks 1 and 2 Click her to review
Sample question:
Q1. You have observed that your heart rate increases upon exercise, having caffeine and when you are scared. You want to conduct a study and of these which one is easily controllable independent variable?
Q2. You want to test two pain killer drugs A and B for their effectiveness in treating headaches. Based on the literature available and the chemical composition of the drugs you think drug A is more effective than B. You would like to determine which one is the most effective. State your hypothesis, design an experiment, and state a result that would support your hypothesis.
Remember to include positive and negative controls. What is the independent and dependent variable of this experiment? Name the constant variables of this experiment. (8 points)
Q 3. I am studying the effect of exercise on heart rate. Which will be the independent variable of this experiment.
Examples:
- I have a book with a weight of 0.46 lbs. What is the mass of this book in kg?
- I have a sample of a fluid with a volume of 670 ml. What is the volume of this sample in gal?
- I have a sample that diffused to a diameter of 0.2 inches. What is this diameter in mm? Q1. In an experiment, you calculate that the mass of a 95.5 ml sample of a liquid is 75 grams. You know that this liquid is one of the substances below: Which liquid do you have?
Q 2: If a silver nugget occupies a volume of 8 ml what will be the mass of this metal? (density of silver is 10.5 g/ml).
What do we know about atoms?
Applications:
- I have an isotope with an atomic number of 48 and a mass number of 130. How many protons, electrons, and neutrons would I expect this atom to have, and what is this element?
- I have an isotope of Oxygen with 9 neutrons. What is the mass number of this isotope? Answer:
Applications:
- What would be the charge of an ion of oxygen?
- What would be the electron configuration of an Mg ion?
- Determine which ion has the ground-state electron configuration of:
- How many valance electrons (outermost electrons) will each of the following have?
- An ion has 12 neutrons, 11 protons, and 10 electrons. What is the charge of this ion?
- Use your understanding of ions and ground-state atoms to determine how many electrons you would expect each of the following species to contain:……….. Continue
| Instituition / Term | |
| Term | Summer |
| Institution | Chamberlain |
| Contributor | Karin Austin |
-80x80.JPG "CHEM 120 Week 2 Discussion; Atomic Structure")
-80x80.JPG "CHEM 120 Week 6 Discussion: Radiation - Radioisotope Tc-99m")
