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

I need help with these question please

1 answer pls

please please help me plssss

Please help with #5

Calculate density of a metal an unknown metal

Please help with #3

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

#6

#4

Question 4

Counting significant digits when measurements are added Br. Add or subtract the following measurements. Be sure each answer you enter contains the correct number of significant digits. 9.870 mL + 7.9 mL = 6.67 mL - 1.907 mL mL 16.87 mL + 2.727 mL Explanation Check O2021 McGraw Hill LLC. All Rights Reserved. P Type here to search 38°F Mostly DELL 目

Kindly answer the B. The Metric System only

Is this calculation correct? See image below. ...

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?

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

Please help with question 3

Beaker directions: • Measure the liquid in the beaker. Look at what the lines stand for (these are very limited in their ability to measure). Account for all digits on the instrument and then add 1 estimated digit. • If there is not a line for a place value (1, 2, 3...), then that is the furthest you can estimate! O 48.05 48 48.0 100- 80 60 40 20 beaker B O 48.005

Item 2. Length   3. Estimated Digit   4. Number of Significant Figures Width of little fingernail 0.82 cm   *   * Distance around wrist 21.45 cm   *   * Length of your shoe 26.34 cm   *   * Length of line Your measurement             13.74 cm Other students’ values        13.72 cm                     13.77 cm How does your value of the line length compare to those of other students?   Questions and Problems   Q1   What digits in the measurements for the line by other students are the same as yours and which are different?