Lab Report 1

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

Solve correctly please. Should correct.

2 - MEASUREMENTS AND CALCULATIONS O Previous Page 21 of 22 E Next O References Use the References to access important values if needed for this question. Use unit analysis to show how to calculate the mass of 16.8 mL of aluminum. See the table below for the density of aluminum. (number) (unit) 16.8 mL Al g Al 16.8 (number) (unit) Densities of Some Common Substances Substance Density (g/mL) Water 1.00 Aluminum 2.72 étv A A O 66 JAN 27 280

What is the volume of the liquid based on the measurement shown in the following image? Choose the answer with the correct number of significant figures. ... 15 A 13.0 mL B) 13.00 mL 11.50 mL D 11.5 mL

When reading off of a calibrated instrument or glassware, the last digit reported is always an estimation. This estimation introduces error to your data. systematic O random

Please answer this question as fast as you can please and tahnk you. I will afterwards write an wonderful review on solving the question. Thank you. You determined experimentally the density of a solution in triplicate. Considering the results what is the %RSD of  results? Answer your question with the correct number of significant figures. Please enter answer as a % not in decimal form. Trial 1: 1.014 g/mL Trial 2: 0.914 g/mL Trial 3: 1.190 g/mL

ALEKS - Megan Boy... Classes | Pivot Inter... ta The Expert TA | Hu... PDFescape O STOICHIOMETRY Interconverting number of atoms and mass of compound Calculate the number of vanadium atoms in a 90.0 g sample of vanadium(V) oxide (V,0,). Be sure your answer has a unit symbol if necessary, and round it to 3 significant digits. x10 Check

Please don't provide handwrittin solution....

Part B.1: Measuring the volume of a sample of water. Measuring Device Beaker Graduated Cylinder Measured Value 41 mL 38.0 mL Number of Significant Figures | Which measuring device is more precise? The beaker or the graduated cylinder? [ans]

Match column A (tests) to column B (positive results) and column C (substance) in answering, Use CAPITAL LETTERS for column B and small letters for Column C. Separate each anser with one(1) space not comma(,). If there are more than one answer for each column then write possible answers Ex. 1. B c 2. B c e

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Question 1-15

4. When you get your 5th correct answer, you will get a certificate that you can share with your teacher letting your teacher know how you did. Please provide a screenshot of your certificate showing you got this completed. DATA Part B: Measuring the Mass of Materials Top Loading Balance Mass Empty Beaker (g) Mass of Beaker + Paper Clips (g) Mass of Paper Clips (g) Analytical Balance Mass of Empty Beaker (g) Mass of Beaker + Paper Clips (g) Mass of Paper Clips (g) DATA ANALYSIS: 1. Show your calculation for the mass of paper clips using the top-loading and analytical balances. 2. Which of the balances, top-loading or analytical, has the most uncertainty per measurement? Explain. Page 10 of 14

QUESTION 5 Express 4.5 μmol.mL-1 s1 is the units of M.min1 (only type in your numerical value).

Jack measured the mass of an empty evaporating dish and watch glass, and weighed approximately 0.5 g of an unknown solid into the evaporating dish.  He then followed the procedure for Lab Exercise 5, and collected the rest of the data in the table below.  Please note that row letters correspond to those found on the data sheet that you will use in lab.  A Mass of empty evaporating dish + watch glass 65.362 g B Mass of dish + watch glass + initial solid 65.864 g C Mass of dish + watch glass + carbonate 65.705 g D Mass of dish + watch glass + chloride 65.716 g  What was the mass (in grams) of the unknown solid that Jack used in his experiment. Report your answer to the correct number of significant figures.

answer then one of those cheap samples crept into ou stock of metal samples and you "unknown metal”. Note: volume measurements are not very exact. If your density determination is off by 0.1 or 0.2 from the known value, that's probably good enough for an identity. Metal Platinum Gold Tantalum Silver a) You weight your sample and determine it weighs 71.8 grams. You put the sample into 15.6 mL of water and the total volume rises to 22.4 ml. What metal do you have? Density (g/ml) 21.45 19.32 16.65 10.50 Metal Palladium Rhodium Plutonium Uranium Density (g/ml) 12.02 12.41 19.84 18.95 Metal Polonium Niobium Tungsten Gallium Density (g/ml) 9.3 8.57 19.35 5.91 b) You weight your sample and determine it weighs 56.3 grams. You put the sample into 28.9 mL of water and the total volume rises to 32.9 ml. What metal do you have? c) You weight your sample and determine it weighs 105.3 grams. You put the sample into 31.2 mL of water and the total volume rises to 39.6 ml. What metal do you have? d)…

3. Solve the following . Express the answers in appropriate num ber of significant figures. Show your solutions. a.) 32.44 t 4.9 -0. 304 82. 94 b.) 8.002 t 0.3040 6). 13.4 - 0.066 t.1.02

Pl. 1 please answer the question correctly and make it clear what the answer is please, show all work, thank you.

Percent error of the recorded data. Theoretical mass of Nickel- 5.000g

How to determine the number of significant figures when computing percent error? Is it based on the experimental value or theoretical value? or both?

Which of the following is the correct sequence of weighing using an analytical balance? I. Press Tare II. Weigh container and sample III. Weigh container ... (A) II, I, III B III, I, II C) I, II, II D) II, III, I

Urgently in one hour

Please help with question 6

5) How will each of the following experimental errors influence the results of your calculated densities you reported? State whether the error will tend to make your density results too large, too small or unchanged. Explain why this would occur by identifying which measurements would be affected (high or low) and how this would affect the calculated density. a) In method 2, the metal cylinder you used had a number of air bubbles on its when immersed in the water.

General Chemistry C OWLV2 | Online teaching and learning resource from C.. b My Questions [References] Use the References to access important values if needed for this questi A calculator is found to have a mass of 118 grams. Using unit analysis, show what the mass of this calculator is in pounds. Use one of the following to set up the conversion factor. 454 g = 1 lb = 16 oz 1 m = 39.4 in = 3.28 feet 2.54 cm = 1 in 1 km = 0.621 mile 1L = 1.06 qt 3.79 L = 1 gal (number) (unit) 118 grams x lb (number) (unit) Submit Answer Try Another Version 5 item attempts remaining Cengage Learning | Cengage Technical Support

Round to correct amount of significant figures please. Thank you!

How many mL of 0.799 molar magnesium chloride must a scientist pour into a beaker to have 16.1 g of magnesium chloride in the beaker? Put answer in box in regular non scientific notation with one past decimal.

Give detailed Solution..don't give Handwritten answer