Module 11: Exam Review Assignment

University:
California State University, Northridge
Course:
CHEM 100 | Principles of Chemistry
Academic year:

2022
Views:

0

Pages:

6
Author:

customer-8173472

Module 11 Exam review assignment Name: Dianna Pushkash Assignment must be turned in at due date. We will review in class the day before the exam. Once we start going over it in class the highest score you can get is a 50%, no exceptions. D=m/v % error = ([ Experimental – Literature]/literature) x 100 Question Answer List and describe the parts of a lab investigation read procedure, write purpose, claim/hypothesis, materials, data, conclusion List the SI base units s, m, kg, K, amp, mole, Cd Identify the function and name of each of the following instruments: Ruler. Measures things under 12 inches. Balance. Weighs objects ’ mass. Beaker. Holds liquids up to 100mL. Gradu ated cylinder. Hols liquids up to 27 mL. Convert 15 cm to meters 0.15m Convert 200 mg to grams 0.200g Convert 7 km to hectometers 70hm Describe the following sets of data in terms of accuracy and precision: The following set of data is neither 1 3.01 cm, 16.07 cm, and 31.0 cm. T he true value/standard is 30.00 cm. precise nor accurate. None of the numbers are close to the true value or to each other. 1.1 x 10^3 Express the following in scientific notation 2.3 x 1,100 10^1 23 1.29 x 10^ 0.000129 -4 Express the following in standard notation 2.2 x 10 2 A) 220 B) 0.013 1.3 x 10 2 No horseplay No eating or drink in lab List 5 rules of lab safety. Wear goggles at all times Hair up Wash hands Write the following number of significant figures each number represents 3400 cm 0.000280 m 1.0 hr 2 3 2 4 1.103 min Perform the math operations and record your answer in correct significant figures. 41 . 4 + 77 . 50 + 200 = 300 2.8 x 6.4 x 219 39 000 = 15 .39 0.25 – 0.357 + 0.36 1 5.492 = 5.9 / 1 6 .20= If the density of an object is 0.03 g/mL and the density of water is 1.00 The object will float because it is less g/mL, will the object sink or float in water? Explain. dense than the water. Joshua uses his thermometer and finds the boiling point of ethyl alcohol to be 67 16.25% error C. He looks in a reference book and finds that the actual boiling point of ethyl alcohol is 80 C. What is his percent error? What volume of silver metal will weigh exactly 250.0 g. The density of silver is 10.5 g/cm 3 V= 23.81cm^3 . 35.5 g of iron shot is added to a graduated cylinder containing 45.50 mL of water. The water level rises to the 49.10 mL mark . 9.86g/mL From this information, calculate the density of iron. Five mL of ethanol has a mass of 2.3 g, and Benzene is denser. 4 .0 mL of benzene has a mass of 44 g. Which liquid is denser? A block of wood 4 cm on each side has a mass of 6 9 g. What is the density of the block? (Hint, don’t forget to find the volume of the wood.) 1.08 g/cm^3

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