Lab 4_Laboratory Skills

Laboratory 2 Report Sheet-Lab 2 A.2 Area Your measurements Length = Width = Area = (Show calculations.) Why could two students obtain different values for the calculated areas of the same rectangle? A.3 Volume of a solid by direct measurement Shape of solid Formula for volume of solid 18 Height Width Another student's measurements Volume of the solid (Show calculations of volume including the units.) Length Diameter (if cylinder) Page 3 of 3 482 words 区

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Calculate density of a metal an unknown metal

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Please correct answer and don't use hand rating

Density Experiment NAME: Date Questions: 1. What is the density of a solid with a volume of 32.5 mL and a mass of 27.1 grams? 2. A graduated cylinder is filled to 25.0 mL with liquid. A solid object is added to the liquid and the new volume is recorded at 34.2 mL. The mass of the solid object is 64.5 g. What is the density of the solid object? > 3. What is the name of the technique used to weigh the unknown liquid in part A of the experiment? ics kng 4. What is the name of the technique used to determine the volume of the solid in Part B of the experiment? nkng on on > es Calendar T To Do O Notifications M Inbox

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Question 4

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Kindly answer the B. The Metric System only

Fill out the result table

Express your answers in scientific notation with the correct number of significant figures. Pay attention to the units and remember how to do conversions. One peanut M&M weighs approximately 2.33 g. A.  How many peanut M&Ms are there in 53.768 kg of M&M’s? B.  What is the weight of 43 peanut M&Ms in milligrams?

Experiment 3: Determination of the Average Mass of a Penny  Number of pennies: 5 Mass of pennies (weighed together): 13.2 Mass of penny 1: 2.5 Mass of penny 2: 2.5 Mass of penny 3: 2.6 Mass of penny 4: 2.5 Mass of penny 5: 3.1 please help me with this part and show me all step  ??????? ???? ?? ? ?????=??? ?? ?ℎ? ?????????? ?????? ?? ?ℎ? ???? ???????/5  1. Total Mass of five pennies (weighed separately): 2. Average mass of a penny (using mass of five pennies weighed together)

General Chemistry Laboratory I Lab 1 Significant Figures and Dimensional Analysis Student name PRE-LABORATORY QUESTIONS 1. How many significant figures are in each measurement? (1) 0.0044500 m (2) 5.003 km (4) 1.00 x 10³ s (5) 0.002 mm 2. Define accuracy and precision. 3. Convert 1.567 kilometers to centimeters.ccurate d 4. Convert 3.70 milligrams to kilograms. O Date: Page 1 IN-LABORATORY WORKSHEET 1. Give the number of significant figures in each of the following numbers. (1) 1,278.50 (2) 120,000 (4) 0.0053567 (5) 670 (7) 8.002 (8) 823.012 (10) 2.60 (Prepared by W. Song) (3) 10 dm (6) 10,000 m (3) 90,027.00 (6) 0.00730 (9) 0005789

2. A student performs an experiment Her data is below: Table 1. Masses Before and After Pulling Steel Wool Apart Trial 1 Trial 2 Trial 3 158.93 g 157.45 g 145.67 g Initial mass of steel wool Final mass of steel wool Difference AVERAGE 158.92 g -0.01 g 157.48 g 0.03 g -0.003 g 145.64 g -0.03 g Draw a diagram to show the particles before and after pulling: Before After

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