E1_density_worksheet_SP2024

Question 20

Real-World Chemistry 1. Suppose you wanted to ship bananas from Puerto Rico to New York and the time required for shipment was 8 days. Will you choose to ship ripe bananas or green bananas? Why? 2. You may have heard the saying "One bad apple will spoil the whole barrel." Based on the results of | your experiment, do you think the statement may be true? Why?

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

•All groups will add nystatin (an antifungal) to their tubes. The stock concentration is (50 mg/mL). The final concentration will be 50 µg/mL. ● • Calculate how much nystatin will be added to your TSA tubes. Each 15 mL TSA tube will get final concentration of 50 µg/mL. The …... will be used. Pipettor Blue Yellow Grey Volumes 100 - 1000 μL 10 - 100 μL 1-10 μL μL of nystatin to give a pipettor

Question 19

During the experiment, can the crucible and lid be touched with bare hands? (Choose all correct answers) No. If the crucible is still hot, a student can burn his or her hand. Yes. Gloves can be slippery, making it more dangerous to wear them in lab. Yes. They are easier to transport to the balance room and bare hands do not introduce error into the experiment. No. Dirt and oils on hands can add to the mass of the crucible.

11) The half-life of Aluminum-28 from your lab is 2.2414 minutes. If you start with 13 mg of the material, how long will it take for the amount of Al-28 to drop to 1.3 mg?

Why do scientists need to perform experiments

ITEMS USED FOR EXPERIMENT: •Ring stand •Hot plate •125 mL Erlenmeyer flask•400 mL beaker•10 mL graduated cylinder •Aluminum foil•Rubberband•Paper Clip•Thermometer•Vial containing unknown liquid You know have the following data: Mass of flask + foil + rubberband: 78.637 gMass of flask + foil and rubberband+ unknown condensed liquid: 78.847 gTemperature of water bath: 100C = 373 KPressure of gas in our system: 29.02 inHg = 0.9699 atmVolume of gas in our system: 141 mL = 0.141 L 1. During the experiment, you collect the following data: Mass of flask: 80.001 g Mass of flask + unknown condensed liquid: 80.452 g Temperature of water bath: 100 °C Pressure of gas in our system: 0.998 atm Volume of gas in our system: 265 mL Which of the following number(s) need a conversion before they can be used? (Check all that apply) [ ] Group of answer choices [ ] Volume of gas in our system [ ] Mass of flask [ ] Temperature of water bath [ ] Pressure of gas in our system [ ] Mass of flask +…

As viewed from Earth, most stars appear to move across the sky each night because A stars orbit around Earth   B Earth rotates on its axis   C stars revolve around the center of the galaxy   D Earth revolves around the sun

DATA: Mass of potassium nitrate mass of test tube and potassium nitrate mass of test tube mass of potassium nitrate Volume of water taken Buret readings: Final gaml Initial Volume 4.97 added Temperature at which crystals appear Total volume of water in tube ML 1st addition 2nd addition 7.09ml 12.1ml 2.12 mal 7.09 ml 12.1ml 53.85839 43.9740g 9.9131 water. Record all data in the 4.97 9.98 15.78 4.97 9.98 3rd addition 17.9 ml 21.1ml 78.8 Temperature of water when volume is measured Density of water at when volume is measured (from reference) 0.970 Trial | || 52.0 39.1 21.4°C 15,18 4th addition 18.98 17.9ml ||| 28.2 18.98 IV 2

McGraw Hil ALEKS CHEMISTRY-Gener... esc E ! 1 MEASUREMENT AND MATTER Adding or subtracting and multiplying or dividing measurements Explanation -1 gml1 Q A 1 A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 1.500 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 96.6 g. She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 97.7 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant…

Use the References to access important values if needed for this question. Read the data points from the graph and complete the table below. 25 20 15 10 3 Submit 3. 2.

General Chemistry II Laboratory Manual, 2021 Revision Questions: 1) When you set up the temperature probe using Capstone, you did not calibrate it to read the correct temperature. It's possible that the probe reads temperatures that are consistently off by 1 or 2°C. Why won't this affect your results for this experiment? Explain your answer. 39 2) What do you think is a source of error for this experiment? Do not answer "Errors in weighing or calculations. " 3) If some t-butanol were lost between after it's weighed in before the first run, how would the experimental molar mass of solute be affected? Explain your answer.

Can you help me with questions 4, 5, 6, and 7 please?

Hawaii Carbon Dioxide Time-Series 425 CO2 Time Series in the North Pacific 8.30 Mauna Loa Atmospheric CO2 (ppm) ALOHA seawater PCO2 insitu (uatm) ALOHA seawater pH (insitu) 400- 160°W 158°W 156°W 8.25 23°N Station ALOHA 22 375- - 8.20 21° 20° Station Mauna Loa 8 350- 190 -8.15 325 8.10 300- 8.05 275- 8.00 2021 1958 1967 1976 1985 1994 Year" Data Mauna Loa (php.ondi noan ovproductsrendaeeee n mlo iN) ALOHA phahana soest hawaieduttdogstexionhl) ALOHA pi &C0, e calulated a insitu tempere fhom DIC A TA (measured from samples collected on Hawai Ocean Times-series IOT) enuisen) ing coys (Pelletier, v2so) wih constants Lueker et al. 2000, KSO Dickson, Total boron Lee et al. 2010, & KF secarb 2003 2012 What problem in the oceans does the data collected from 1985 to 2021 show?

Part A If 2.0 x 10-4 moles of S20 in 50 mL solution is consumed in 3 minutes and 17 seconds, what is the rate of consumption of S20 ? Express the rate in mol per liter-second to two significant digits. M 2.128 10 Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining < Return to Assignment Provide Feedback

8) The vessel to be weighed should be placed of the pan. (off to the side, or in the center) 9) After heating a sample in a dish it will save time to weigh it immediately or cool it completely? 10) To avoid the errors in mass due to the use of balances that are not calibrated, one should weigh by a method called 11) If you weigh a hot object on the balance, the reading will be higher, the same, or lower than if it had been weighed after it cools to room temperature? (higher, the same, or lower) 12) If you weigh a cold object on the balance, the reading will be higher, the same, or lower than if it had been weighed after it warms up to room temperature? (higher, the same, or lower)

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Pmease assist with number 1.   this is NOT a graded question.  See below: This is not a graded question as it is a practice question . I am 60 years old and helping my son prepare for the AP exam in a few months. We do questions at the back of the textbook by Zumdahl and Zumdahl

How to convert 4.76pm to um? Showing the work. 4.76pm x___________m x_____________ um =________________um How to convert 25.0mL to cL? Showing the work.  25.0mL x______________ x ___________ = ______________cL