Lab 3 worksheet

Question 20

How do I fill the tables out?

Just need confirmation of my current answers, especially there significant figures

People Tab Window Help ubmission History: 2. X 101 Chem101 E AWR prep 5 Google Docs Question 15 of 17 An atom of a particular element has a volume of 7.8 x 10-31 m3 What is this volume in cubic nanometers ? ADD FACTOR ANSWER RESET *( ) %3D 10° 10-6 (10-6)3 7.8 x 10 22 (10°)a (1)3 106 7.8 x 10 31 7.8 x 10-4 1 10-9 7.8 x 104 (10°)a nm nm3 um m3 um3 FEB 6. 3. tv

Students used a balance and a graduated cylinder to collect the data shown in Table 2.6. Calculate the density of the sample. If the accepted density of this sample is 6.95 g/mL, calculate the percent error.

The Bay of Fundy in Nova Scotia, Canada is reported to have the largest tides in the world with high tide and low tide occurring two times per day. The tides can measure ft in height. At the Hopewell Rocks at Hopewell Cape, over approximately 50.0 on a specific day height increase was recorded as a rate of 6.08 feet per hour. What is the rate in meters per second ? ARTING AMOUNT ADD FACTOR DELETE ANSWER RESET *( ) %3D 60 5.15 x 104 1 0.332 7 50.0 111 1.20 x 103 0.3048 12 6.08 0.0309 ft ft/h h min day m/s S

A human hair is 75 um across. How many inches is this? STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) %D 0.01 100 10 1 1x 10° 1 x 10-6 0.1 2.54 1 x 106 0.33 0.001 0.003 3.0 1 x 10-9 75 1000 0.00003 in mm cm um 30

3

A cooking recipe lists adding 3.0 qt of water as a step. How many mL of water is this?

[References] Use the References to access important values if needed for this question. Write each of the following numbers in exponential or scientific notation. Write each number to two decimal places with only one non- zero digit before the decimal point. Example: Use 1.20 × 104 not 0.120 × 10-³ or 12.0 × 10-5. 7640 0.000125 0.000844 257000 Submit Answer 4 Try Another Version 1 item attempt remaining Previous Next

I have attached a photo of what I need help with below. It is helping with finding total area and volume of 4 spheres. Thank you

The ionic radius of a sodium ion is 2.27 angstroms (A). What is this length in um 1010 2.27 X 2.27 x 10 pm STARTING AMOUNT 1 101° m 2.27 Å x = 2.27 × 10* µm 1A ADD FACTOR DELETE ANSWER RESET *( ) 2.27 0.0227 10° 2.27 x 1010 1 106 1010 1010 104 104 10 10 2.27 x 104 2.27 x 10* um A cm

Part 3: Calculate density of a metal an unknown metal. 1. Using the pictures below, record the displayed data in the data table in the report sheet. Make sure to include the right number of significant figures in the measurements and calculations. Mass measurement 7.1 g Volume of water measurement. There's only one measurement here – the larger image is for magnification only. -20 15 m Volume of water and metal measurement. There's only one measurement here – the larger image is for magnification only. 20 m 15

Please answer both questions.

I cannot figure this question out. I cannot find any one of these numbers that has 3 significant figures, and when I say that 200 has 1 I get it wrong.

Please answer questions 2&3

Macmillan Learning Introductory Chemistry Revell SECOND EDITION Each of these numbers is written in exponential form, but not in proper scientific notation. Write each number correctly. 49.9 × 108 min = 0.65 × 105 g = 437 x 10-5 m = ×10 min ×10* g ×10* m where x = where x = where x = presented by Macmillan Learning

[References] blems 1 pt INTERACTIVE EXAMPLE Uncertainty in Measurement 1 pt In analyzing a sample of polluted water, a chemist measured out a 25.00-mL water sample with a pipet. At another point in the analysis, the chem to measure 25 mL of a solution. 1 pt The quantity 25 mL means that the volume is between X and X mL. 1 pt The quantity 25.00 mL means that the volume is between X and x mL. 1 pt Resubmit Hide Tutor Steps 1 pt Incorrect

The Bay of Fundy in Nova Scotia, Canada is reported to have the largest tides in the world with high tide and low tide occurring two times per day. The tides can measure over approximately 50.0 ft in height. At the Hopewell Rocks at Hopewell Cape, on a specific day height increase was recorded as a rate of 6.08 feet per hour . What is the rate in meters per second ?

Chrome File Edit View History Bookmarks Profiles Tab Window Help Sun Sep 26 1:21 PM Calendar Course Home Significant Figures Calculator x b Chemistry Question | bartleby x + openvellum.ecollege.com/course.html?courseld=16846218&OpenVellumHMAC=Ddbacfbcfc14ee9f30d6c137a34986a18#10001 L Aluminum, Express your answer in calories per gram per degree Celsius to two significant figures. 0.214 0.897 Al(s) Copper, Cu(s) 0.0920 0.385 ? Gold, Au(s) 0.0308 0.129 Iron, Fe(s) 0.108 0.452 cal/(g .° C) Silver, Ag(s) 0.0562 0.235 Titanium, Ti(s) 0.125 0.523 Submit Request Answer Compounds Ammonia, 0.488 2.04 NH3 (s) Part B Complete previous part(s) Ethanol, 0.588 2.46 C2 H6 O(s) Sodium chloride, Provide Feedback Next > 0.207 0.864 NaCl(s) Water, H2 O(1) 1.00 4.184 Water, H2 0(s) 0.485 2.03 4,419 SEP 1 CC étv 26 280 00 圖

Please help with 7&8

Using the picture and the options given how do I solve this?

For each trial (data in Tables 3 – 5) graph the volume of water displaced (in mL) on the x-axis versus the time in seconds on the y-axis Use the graphing to determine the equation of the best-fit line for your data. Use the equation of the line to determine the slope and reciprocal of the slope for each trial.