Portage Chemistry 103 Module 1 Exam 2023 with 100% correct answers

1.1 EXPONENTIAL NUMBERS The speed of light is 186,000 miles per second. This is 1.86 x 105 (in exponential form) The diameter of an E. coli cell is 0. meters = 8.0 x 10-7 (in exponential form) 0. A number larger than one will have a positive exponent. Move the decimal point nine places to the left to give 4.95 x 109 0.00056 A number smaller than one will have a negative exponent. Move the decimal point 13 places to the right to give 5.6 x 10-13 1.) 0. = smaller than 1 = negative exponent, move decimal 6 places = 4.56 x 10-6 2.) 2.63 x 107 = positive exponent = larger than 1, move decimal 7 places = . 3.) . = larger than 1 = positive exponent, move decimal 6 places = 7.8 x 106 4.) 8.26 x 10-5 = negative exponent = smaller than 1, move decimal 5 places = 0. 5.) 5.38 x 10-3 = negative exponent = smaller than 1, move decimal 3 places = 0.00538 6.) 0. = smaller than 1 = negative exponent, move decimal 4 places = 6.73 x 10-4 7.) 3.82 x 104 = positive exponent = larger than 1, move decimal 4 places = 38200. 8.) . = larger than 1 = positive exponent, move decimal 8 places = 6.23 X 108 1.2: METRIC SYSTEM - UNIT CONVERSIONS 1 foot (ft)=12 inches (in) 1 kilogram (kg)=1000 grams (g) 1 pound (lb)=16 ounces (oz) 1 gallon (gal)=4 quarts (qt) 1000 milliliters (ml)=1 liter (L) 100 centigrams (cg)=1 gram (g) 10 decimeters (dm)=1 meter (m) The prefixes kilo (= 1000), milli (= 1/1000), centi (= 1/100), and deci (= 1/10) are used with any metric unit, such as grams (weight), liters (volume), and meters (distance). The original quantity and unit (to be converted) are multiplied by a conversion factor (which is a fraction made up as follows): New unit (on top) / Old unit (on bottom) 48 ounces = ? pounds 48 o z × 1 p o u n d / 16 o z = 3 p o u n d s 4 kilograms = ? grams 4 Kg X 1000 grams/1kg = 4000 grams 1.) 656 cm x 1 m / 100 cm = 6.56 m 2.) 20 gal x 4 qt / 1 gal = 80 qts 3.) 7820 ml x 1 liter / 1000 ml = 7.82 liters 4.) 36 g x 1000 mg / 1 g = 36000 mg 5.) 25.3 g x 10 dc / 1 g = 253 dg 6.) 6.2 m x 1000 mm / 1 m = 6200 mm 7.) 725 l x 1000 ml / 1 liter = 725,000 ml 8.) 56 ft x 12 in / 1 ft = 672 in