Week 7 laboratory reflection - Plant Transpiration

It gives inacurate results For Wooden" sphere because wood haS the ability to absoro water (imbibition) Date For which object does the method of volume by displacement give an inaccurate result? Why? A4. Calculate the density of each object (use the volume by displacement determination of the volume for each object except the wooden sphere; for the wooden sphere use the volume calculated from the diameter). Show all work with units and record your answers in the table below to the correct number of significant figures and with proper units. pensitty=MassOF Substance VOIUME oF Substance Show work: Lead: 47.460905. 5SF IRON: 263:60955F ろろ。5 ML-るSF -니.2ML→25F =11.39/MLE119/ML %3D7.879/ML nkown sphere: 7.380g-05 4.2ML 2 golden nugget: 31.0094 *VolUMe OF WOoden Sphere: TS OFWOoden sph- ir=radius OF WOoden Sph. 8.99/ML 1.6ML2 %3D199/ML| Table 2: Density Results Object xx 27 CM3 bensity= 그9.170 g/ML=Ol0981 g/ML Calculated Density 119/ML 7.879/ML 0.698/ML 3.99/ML 199/ML lead sphere =113ML…

Dashboard My Home OWLV2 | Online teaching and learning resource from Cengag [References) A student gently drops an object weighing 15.7 g into an open vessel that is full of ethanol, so that a volume of ethanol spills out equal to the volume of the object. The experimenter now finds that the vessel and its contents weigh 10.6 g more than the vessel full of ethanol only. The density of ethanol is 0.789 g/cm°. What is the density of the object? Density = g/cm³ Submit Answer Try Another Version 10 item attempts remaining

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In microbiology, dilutions are critical for getting a countable number of microbes to grow on a petri dish. If you suspect your culture of bacteria has 50 x 106 cells per mL, what would you want the final dilution to be in order to end up with 50 colonies of bacteria on a petri dish? Express your answer as an exponent rounded to two decimal places. Eg. 10.01e-3, not 0.00101. Treat colonies of bacteria (cells / mL) the way you would treat concentration (Moles / L) The formula M1V1 = M2V2 can still be used. The final concentration is the number of colonies on the petri dish. Solve %3D for V2. A 0.00000001 dilution is performed on a culture of bacteria in order to perform viable plate counts. From the dilution, *0.1 mL* of solution is plated on solid media, and 150 colonies of bacteria grow on the petri dish. Assuming each colony came from a single bacterium, how many bacteria are in a single mL of the original culture? Express your answer to two decimal places using exponential notation.…

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1.    In your pharmacy you have a balance with a sensitive requirement of 7mg; 10,25,50 and 100ml graduated cylinder; and 1 oz apothecary and 4-ounce apothecary conical cylinder. What is the minimum measurable volume in ml using the graduated cylinder?a.    5b.    20c.    1d.    2

A student wanted to determine the moisture content of a solid sample using gravimetric methods following the AOAC 930.15 method. The following data were obtained: mass of crucible (container): 24.6743 g initial mass of crucible and sample: 34.2134 g final mass of crucible and sample: 32.0567 g Calculate the %moisture of this sample. Show your entire solving process. You may upload a photo of your solution or you may just type it in.

Please don't provide handwritten solution ......    The density of concentrated sulfuric acid is 1830k(g)/(m^(3)). You obtained 500.0cg of concentrated sulfuric acid. Calculate the volume of the sample in mL. Use the provided Measurement Information. Type only correctly rounded number.

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?

e east.cengagenow.com Chemistry I C OWLV2 I Online teaching and learning resource from C. b Answered: The number 9.469709 rounded to 2. | bart. G 54.0 (References] Use the References to access important values if needed for this question. It is often necessary to do calculations using scientific notation when working chemistry problems. For practice, perform each of the following calculations. (9.40×10“)(4.27×10$) = 5.00x104 9.45x104 (9.40x10 )(6.46×10) (1.00x108)(5.00x1o4) Submit Answer Try Another Version 5 item attempts remaining Cengage Learning Cengage Technical Support

s/Interface/acellus engine.html?ClassID=14676880634 IS C₂H4 (g) + O₂(g) → CO₂(g) + H₂O(g) [g 17.11g 15.69 g 6.42 g According to the law of conservation of mass, what is the mass of ethene, C2H4, burns in this reaction? D Use the correct same precision for the missing value. (i.e. significant figures). International Academy of Science. All Rights Reserved. * G Enter A

The average adult heart pumps about 84. mL/s of blood at 72 beats per minute. Suppose you need to calculate how long it would take the average heart to circulate 2400. mL of blood. Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer Includes all the correct unit symbols. time = Continue Submit Assignment 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center Accessibility 10 esc # $ & 1 2 3 4 5 6. 7 8 9.

A student decided to undertake a balance calibration exercise during a lab session involving burette calibration. He found the apparent weight of calcium carbonate in air to be 100 grams and density to be 1.33g/mL. Assume that the standard steel weight used in the calibration has a density of 8.0g/mL and air has a density of 0.0012g/mL. What would be the true mass of the calcium carbonate sample?

https://www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IQg34RWYTxj_1SoekWMaP1As1fEH O MEASUREMENT Multiplication and division of measurements Decide whether each proposed multiplication or division of measurements is pc proposed multiplication or division (2.0 g). (5.0 cm²) - ? (1.0 mg)-(0.022 g) = ? (3.0 g)-(0.010 kg) = ? Explanation Check Is this possible? O yes no O yes O no O yes O no result 0 ロ・ロ μ 00

Give detailed Solution..show work..don't give Handwritten answer

(a) Use the following theoretical density values for copper and zinc metals (in g/mL) and the experimental density values you obtained in Question 12 to determine the percent error in each of your experimental values. Density of copper (theoretical) ρCu = 8.94 g/mL  Density of zinc (theoretical) ΡZn = 7.14 g/mL The equation for percent error is: "%Error"=|"Experimental value - Theoretical value" /"Theoretical value" |×100 Show your work and calculated values, include units. (b) Suggest possible reasons for differences between the experimental and theoretical density values for each metal. 14. Describe any issues you had with the virtual lab, or any unrealistic situations you thought were funny. Also describe the benefits and deficiencies you seen in virtual labs compared to real lab experiences.

Green Dragon Vineyards makes and sells wine in different size bottles. Decide whether each property of their wine bottles listed in the table below is extensive or intensive, if you can. If there's not enough information to decide, check the can't decide box. The average recommended serving size. The time it takes to pour out one serving of the wine. The time it takes to pour out all the wine in the bottle. extensive O intensive O (can't decide) O extensive O intensive O (can't decide) O extensive O Intensive O (can't decide) X ?

Ammonium phosphate ((NH4),PO4 PO is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid (H3PO4) with ammonia (NH,) What mass of ammonium phosphate is produced by the reaction of 8.1 g of ammonia? Round your answer to 2 significant digits. x10 Continue Submit Assignm 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center Accessit ook 80 000 O00 F1 F2 DII DD ♡ E3 F4 F5 F6 F7 F8 F9 F10 F11

1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…

1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…

1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…

1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…

One student calibrated a 50-ml burette by using the mass of water delivered. The student used an analytical balance which was previously calibrated by STEEL (density = 7.8 g/mL). During calibration, the temperature of water was found to be 19.0.C. The density of water at this temperature is 0.9984 g/ml The results of the calibration by the student is shown in the table below:   A B C  D E Apparent burette reading,mL 10.05 20.04 30.08 40.07 49.98 Weight H2O delivered, g 10.03 20.09 30.05 40.02 49.83 Note: All masses in mentioned in this section are understood to be in grams and all volumes mentioned are understood to be in milliliters. 35. What is the true mass of water delivered in A? A) 10.03 B) 10.04 C) 10.05 D) 10.06 E) 10.07 36. What is the true mass of water delivered in B? A) 20.12 B) 20.13 C) 20.14 D) 20.15 E) 20.1637. What is the true mass of water delivered in C? A) 30.13 B) 30.11 C) 30.10 D) 30.09 E) 30.08 38. What is the true mass of water delivered in D? A) 40.09…

How do I write 100pm in scientific notation?

A group of students were trying to experimentally determine the density of an unknown liquid. They developed a standard technique for measuring density by recording the mass of a liquid using an analytical balance. The volume of the liquids were accurately measured using a serological pipette and was recorded to be 5.00 mL for each trial. The students were able to collect the following data: LIQUID Trial 1 (mass in Trial 2 (mass in Trial 3 (mass in Theoretical SAMPLE grams) grams) grams) Density Hexane 3.281 3.284 3.279 0.655 g/ml Acetone 3.921 3.923 3.947 0.784 g/mL Ethanol 3.912 3.911 3.913 0.789 g/mL unknown 3.914 3.911 3.910 Using the calculated experimental average density of the liquid samples as reference, what is the probable identity of the unknown? ethanol heхane acetone cannot be determined

A chemist analyzes a sample of iron ore furnished by the National Institute of Standards and Technology, NIST. He obtains the following results: = 10.52%, s = 0.05, n = 10. The NIST's value for this sample is 10.60% Fe. Is the chemist's result (mean) significantly different at the 95% confidence level?

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