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CHEM 120 Week 1 Assignment Atoms, Dimensional Analysis, and the Scientific Method(v2)

For the problems given below, show ALL work and always write appropriate units at all times.

1. Question: You have samples of 3 different sanitizer bottles. They cost $10 a gallon, $20 a gallon and $30 a gallon respectively.  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. (3 points)
2. Question: If a medicine has a dosage of 20 ml, how many doses are in a 4-gallon bottle? (2 points)

Week 1 Assignment  Practice

For the two problems given below, show ALL work and always write appropriate units at all time

3. Question: Convert your weight in pounds into Kilograms(2 points)
   1. Now change your weight from kilograms to grams.
4. Question: If a medicine has a dosage of 2000 ml, how many gallons of fluid is that? This is a 2 step problem.
5. Question: Aluminum has a density of 2.7 g/cm³, how much space in cm³ would 100 grams of aluminum occupy? (2 points)
6. Question: Give the charges, and names of the 3 subatomic particles. (1 point for each row: 3 points total).
7. Question: 92 inches = _______ cm (2 points)
8. Question: 16500mL = _______ gallon (2 points)
9. Question: If the density of a metal bar is 3.47 g/mL and volume is 30 mL, calculate the mass of the metal bar in gram (kilo). (2 points)
10. Question: Identify the following as physical or chemical properties. (3 points, 0.5 point each)
11. Question: If an atom contains 18 protons and 20 neutrons, its atomic number is __________ and mass number is ___________. It has ____________ electrons. Show calculation where applicable. Identify the element and write its full name and chemical symbol. (2 points)
12. Question: If an atom contains 2 protons and 5 neutrons, its atomic number is ____________ and mass number is _________. It has ___________ electrons. Show calculation where applicable. Identify the element and write its full name and chemical symbol. (2 points)
13. Question: Complete the following table based on information given about the element Boron. (1 point each row, 4 points total).