10:06 AM Fri Sep 2432%O
< AA drive.google.com + Q Single Sign... Lab: Introdu... Х Laboratory E... a Amazon.co... Mail - Konish... SOLUTION:... is.gov -... Chemistry 101 Laboratory exercise on Introduction to Science What are we doing this week? You are going to perform Lab 2 (Introduction to Science) in the esciencelabs laboratory manual. • Lab 2 starts on page 35 of the lab manual. You are going to enter your answers using this document and then you will submit your lab exercise by uploading it to Blackboard. Please note that I have changed some of the questions for this lab, so you should ONLY use the manual for reading the background information. You should use this document to record your questions and answers. . o o o o What should I do once I turn to page 35? Read everything from pages 35 – 37. This covers: Introduction Observations • Developing a hypothesis Variables Controls o Collecting and presenting data Page 38 covers significant digits and scientific notation. If you want to read that part, be my guest, but we have already covered it in “lecture.” Page 39 talks about how to present data using tables and graphs. You should probably read that part, especially if you are unfamiliar with making tables and graphs. We won't use this information for this week’s lab exercise, but we will use it in later exercises. The top of page 40 shows you a formula for something called percent error. Make sure you understand the idea behind percent error. You won't need to use this formula for this lab exercise, but you may need it for a future exercise. Also, you don't need to memorize this formula, but you should understand how to use it. The second part of page 40 gives you some pointers on how to write a lab report. Lab reports are, almost by definition, awful. Nobody likes to write them, and I am absolutely certain that nobody enjoys reading them. You will be writing a formal lab report for one of the lab exercises, but not this one, so you can kind of read page 40, and tuck it away in the back of your mind until later. Then you should fill in the data tables that begin on the next page. When you are done, submit this document to me by uploading it in Blackboard. . Chemistry 101 Laboratory exercise on Introduction to Science Exercise 1: Unit conversion Convert each value into the designated units. You may have to look up conversion information to complete this part. Aca Ira 10:06 AM Fri Sep 24 32%O < AA drive.google.com + Q Single Sign... Lab: Introdu... х Laboratory E... a Amazon.co... Mail - Konish... SOLUTION:... is.gov -... Chemistry 101 Laboratory exercise on Introduction to Science Exercise 2: Significant digits & Scientific notation Part 1. Determine the number of significant digits in each number. Number Total number of significant digits 405000 0.0098 39.999999 13.00 80000089 55430.00 620.03080 Part 2. Convert each regular number to scientific notation. Number in standard format Scientific notation 70000000000 0.000000048 67890000 70500 450900800 0.009045 0.023 25.2 7 Part 3. Convert each number that is written in scientific notation to a number written in standard format (this is not in your lab manual). Number in scientific notation Standard format 3 x 104 6.2 x 10-6 5.44 x 105 5.44 x 10-3 5 X 100 Chemistry 101 Laboratory exercise on Introduction to Science Exercise 3: Experimental Variables Determine the variables tested in the following experiment. If applicable, determine and identify any positive or negative controls. 10:06 AM Fri Sep 24 32%O < AA drive.google.com + Q Single Sign... Lab: Introdu... х Laboratory E... a Amazon.co... Mail - Konish... SOLUTION:... is.gov -... Chemistry 101 Laboratory exercise on Introduction to Science Exercise 1: Unit conversion Convert each value into the designated units. You may have to look up conversion information to complete this part. 46.0 g = _kg 57 seconds = minutes 13.5 cm = inches 47°F = °C Page 2 4 Chemistry 101 Laboratory exercise on Ytroduction to Science @ + 10:06 AM Fri Sep 24 32%O < AA drive.google.com + Q Single Sign... Lab: Introdu... х Laboratory E... a Amazon.co... Mail - Konish... SOLUTION:... is.gov -... 5.44 x 105 5.44 x 10-3 5 x 10° Chemistry 101 Laboratory exercise on Introduction to Science Exercise 3: Experimental Variables Determine the variables tested in the following experiment. If applicable, determine and identify any positive or negative controls. Experiment 1: A study is performed to test the effects of habitat space on the size of fish populations. Different sized aquariums are set up with six goldfish in each aquarium. Over a period of six months, the fish are fed the same type and amount of food. The aquariums are equally maintained and cleaned throughout the experiment. The temperature of the water is kept constant. At the end of the experiment the number of surviving fish are surveyed. Your answers Independent variable Dependent variable Controls Experiment 2: I am omitting experiment 2 (found on page 42 of your lab manual) because it requires a lot of background knowledge that you might not have and it is horribly written. Quiz Ch 1 and 2 1) Which of the following is the basic unit of volume in the metric system? A) liter B) kilogram C) meter D) centimeter E) gram 2) The amount of space occupied by a substance is its A) mass B) density C) weight D) length E) volume 3) A value of 36 mL is a measure of A) density B) mass C) temperature D) volume E) length 4) The measurement of the gravitational pull on an object is its A) volume B) weight C) mass D) length E) size 5) The number of significant figures in the measurement of 45.030 mm is A) none B) three C) four D) five E) six 6) How many significant figures are in the number 0.00208? A) six B) two C) three D) four E) five 7) Which of the following is the largest unit? A) millimeter B) micrometer C) meter < Previous Next → Download Quiz ch 1 aand 2 Chem 101 (2).docx (17.4 KB) Page < 2. of 3 ZOOM + Quiz Ch 1 and 2 D) decimeter E) kilometer Express each of the following numbers using Scientific Notation. 8) 5 207 000 9) 0.000860 10) 1.00 pint of milk has a volume of how many milliliters? A) 473 mL B) 530. mL C) 1000 mL D) 1890 mL E) 106 mL 11) How many pounds are in 3.5 kg? A) 7.7 lb B) 1.59 lb C) 0.629 lb D) 1.6 lb E) 7.70 lb 12) How many centimeters are there in 57.0 in.? A) 22 cm B) 0.0445 cm C) 145 cm D) 22.4 cm E) 140 cm 13) A dose of aspirin of 5.0 mg per kilogram of body weight has been prescribed to reduce the fever of an infant weighing 8.5 pounds. The number of milligrams of aspirin that should be administered is A) 19 mg B) 53 mg C) 1.6 mg D) 5.0 mg E) 0.59 mg 14) A doctor's order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0 mL. How many milliliters of the suspension are required? A) 0.0025 mL B) 3.0 mL C) 2.5 mL D) 6.3 mL E) 0.0063 mL < Previous Next >
Download Quiz ch 1 aand 2 Chem 101 (2).docx (17.4 KB)
Page < 3 of 3 ZOOM + Quiz Ch 1 and 2 15) How many kilograms are in 30.4 lb? A) 13.8 kg B) 14 kg C) 67 kg D) 66.88 kg E) 66.9 kg < Previous Next →
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