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answer with all work

Prelab1 Please help with 1-3

Please help with questions 2 & 3

LIMIT TEST (IMPURITIES - BIOLOGICAL) Instructions: Note the color change of each of the samples by writing blue or pink accordingly. Then give inference whether the sample is contaminated or not contaminated upon observation. Answer the highlighted numbers.     BLANK  (Sterile distilled water) Reference Sugar Solution Sample A Sample B REPLICATE 1 BLUE BLUE PINK PINK REPLICATE 2 BLUE PINK BLUE PINK REPLICATE 3 BLUE PINK PINK PINK INFERENCE NOT CONTAMINATED CONTAMINATED 1 2   1. 2. 3. Which of the two samples is relatively clean of biological impurities? 4. Given the result in limit test as an analyst, what will be the final conclusion to this? Write whether rejected or accepted for each sample.  (see attached photo)

"Precision" is the ___________ of a measurement a. probability b. repeatability c. variability d. exactness

70 Ga 31 Express your answers as integers separated by commas. ? Np, Nn, Ne = Submit Request Answer

Possible multiple answers

Answer numbers 38-45

An object measuring 0.76 decimeters will have a length of ________ centimeters. Group of answer choices

V. Activities General Directions: Write all your answers in your activity notebook. A. How Close? Directions: Compute the percent error for each of the experiments. Assume that the observed value is the mean of the measurements. Express your answer up to 2 decimal places. True Value 124 g True Value 1.75 lb 1. 6. Trial # 1 120 g Trial # 1 2.75 lb Trial # 2 121 g Trial # 2 2.76 lb Trial # 3 120 g Trial # 3 2.78 lb True Value 1.15 L True Value 0.15 m 2. 7. Trial # 1 0.95 L Trial # 1 0.09 m Trial # 2 1.16 L Trial # 2 0.23 m Trial # 3 1.26 L. Trial # 3 0.36 m True Value 766 atm True Value 1.43 cm 3. 8. Trial # 1 765.9 atm Trial # 1 1.44 cm Trial # 2 765.8 atm Trial # 2 1.42 cm Trial # 3 766.4 atm Trial # 3 1. 40 cm True Value 10.1 N True Value 9.81 m/s 4. 9. Trial # 1 7 N Trial # 1 14 m/s Trial # 2 3 N Trial # 2 8 m/s Trial # 3 5 N Trial # 3 11 m/s? True Value 15 psi True Value 36.5°C 5. 10. Trial # 1 20 psi Trial # 1 37.2 °C Trial # 2 21 psi Trial # 2 36.1 °C Trial # 3 19.5 psi Trial # 3…

_____________________ a large spherical object that orbits a star

Please correct answer and don't used hand raiting

Please show work Thank you!

Ab GL B art 3 SHOW WORK ond Shipp: Attempt 1 Hu/d21/Ims/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=5956136&isprv=&drc=0&qi=5726766&cfql= Answer units ▷ Add attachments to support your work Question 4 (0.5 points) SHOW YOUR WORK. G **N*-*OO If 35.45 mL of 0.8121 M sodium carbonate solution reacts with excess lead (III) nitrate solution to form aqueous sodium nitrate and solid lead (III) carbonate, how many grams of lead (III) carbonate is formed? On your paper with your name and date: 1. Go from ionic compound name to formula (review Chp 5 as much as needed) 2. Balance the equation (review Chp 7 if needed). 3. Do the calculation showing ALL units, just like I did in solution stoichiometry lecture. a #

Please help with questions 2-3

Part A Be ion Express your answer as a signed integer in the form 3+. Request Answer Previous Answers Submit Incorrect; Try Again; 3 attempts remaining Part B Sc ion Express your answer as a signed integer in the form 3+. MacBook Air

Give only typing answer with explanation and conclusion

Part A A 300-m length of wire stretches between two towers and carries a 120-A current Determine the magnitude of the force on the wire due to the Earth's magnetic field of 5.0 x 10T which makes an angle of 80 ° with the wire Express your answer to two significant figures and include the appropriate units. F = Value Units Submit Request Answer Aloxt

Consider the following rulers as instruments for the measurement of length.

Question 1 of 20 A barrel of crude oil has a volume of 42 gallons, only approximately 45% of which is processed into gasoline. If your car achieves 32 mi/gal, and you drive 36,000 miles in one year, how many barrels of crude oil are required to run your car for a year? Tap here or pull up for additional resources

true or false?

G Unit 4 Test goformative.com/formatives/605a3bd6021bbe6342a71d44 OYouTube Maps 3 4 6. 7. 8. 10 11 12 13 14 15 16 17 18 19 20 21 9. Keyon and Jarred performed the following experiment: A piece of magnesium was placed on a watch glass; the watch glass and magnesium together weighed 2.00 g. They burned the magnesium and it produced bright light, smoke, heat and a white residue. They then weighed the white residue on the watch glass. Watch glass with residue weighed 2.25 g. From this information, they reached separate conclusions: 1 Keyon: The magnesium gained mass, but it was due to some type of problem with their measurements. Jerrod: The extra mass had to come from the oxygen in the air; burning something always means it combines with oxygen. Which student has the best explanation for the gain in weight and why? Keyon because the experiment should be done several times to make sure they are getting accurate measurements. Jerrod is correct because oxygen in the air added mass, by…

True or False         T   =   PV/nR Group of answer choices True False

all blanks only have one correct answer  Blank 1 answer choices:  A B C Blank 2 answer choices:  A and B  A and C C and B Blank 3 answer choices:  A B C Blank 4 answer choices:  A B C

Which of the following is incorrect: a. General steps in quantitative analysis include: Method selection, sampling, sample processing, calibration & measurement. b. Qualitative analytical methods include: gravimetric, volumetric, spectroscopic and electroanalytical methods. c. The first step in sample processing is sample preparation. d. Replication improves the quality of results and their reliability. e. In quantitative analysis there should be a direct proportionality between a measured property and the concentration or amount of substance. Please fill in the spaces one of the following characters (a or b or cor d or e)

This is showing as an incorrect answer. Please help. Ty

Cancel RESET The Ka of hydrofluoric acid, HF, is 7.1 x 10-4. Calculate the Kb of the fluoride ion, F. Express your answer in correct significant figures. Answer: Use the format 1.2E-3 to report the number 1.2 x 10-3, for example. · $ Adjust Filters Crop Done