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) a. 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: 2.92 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).