Lab Report_Hematology_ Introduction to Blood_Updated final

• Stock solution: 1000 mg/L Target sample concentrations: 50-400 mg/L • Create a 5-point standard dilution to cover the test • If each test only needs 10 mL, make plans to make the dilution so you have 20 mL of each concentration. ·

please i really need your help with this

Answer using complete sentences. Text question.

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)

2. In case of an accident in the classroom, who should be notified immediately? 3. Why is it a safety procedure to tie back long hair in the laboratory? 4. Why should a student not eat or drink in the laboratory? 5. Why should any spills be reported and cleaned immediately? 6. Why should you wash your hands after every laboratory period? 7. Why is rough play in the laboratory dangerous? 8. When would the wearing of safety goggles be a proper procedure? 7

You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.

What animal can reproduce in large number. Is it Mosquito Frog Butterfly Cat Cockroache Dog

Posttest Direction. Read the questions carefully. Write the letter of the correct answer. 1. Water exists in three states of matter and continuously moving through a cycle on Earth. At which stage in the water cycle does water transform from a gas to a liquid? a.evaporation c. precipitation b. condensation d. Sublimation 2. Carbon dioxide (CO2) forms when coal burns in the presence of oxygen. Which of the following is the BEST evidence that a chemical reaction occurs when the coal burns? a. Production of mechanical energy c. A new substance is produced b. Production of electricity d. Formation of precipitate 3.Which of these does NOT happen during a chemical change? a. New substances are formed with different chemical properties. b. Attractive force between atoms of molecule formed or break. c. The chemical properties of the substances before and after the reaction are the same d. Energy is always released or absorbed. 4. A granular substance is added to a liquid. Which of the…

Safety is the     responsibility of the TA only.     primary responsibility of everyone in the lab.     last thing to think about when doing lab experiments.     least important thing, basically just trivia for extra credit.     first topic to read about after you do an experiment.

Calculations are based off of my data table.  I'm not sure how to answer the questions. 1.Based on the results of your experiment, do you have hard or soft water? Does this match the data for your area? Briefly explain your answer. 2.How much calcium would you ingest by drinking one 8 oz glass of your tap water? Show all calculations. 3.What percentage of the recommended daily dose of calcium (1,150 mg/day) does 1.0 L of your water provide? Show all calculations. 4. A complexometric titration can also be used to determine the amount of calcium in milk. The calcium concentration in milk is typically 1,200 mg/L. How would you alter the procedure used in this experiment to determine milk’s calcium content?

Procedure 1. A crime situation is presented to you. You need to solve the crime by using your senses and given information. 2. Fill in the investigation report correctly. CRIME SCENE A man is found dead in a vac ant lot near his work place. In the crime scene, the SO cO collected different pieces of evidence including two pieces of cloth tainted with unknown stains. The police are hoping that through these pieces of evidence they could find the culprit criminal. or Cloth A Cloth B Pieces of evidence Data and Result Crime: Date: Piece of collected evidence:_ OBSERVATIONS: Cloth A Cloth B Final Findings: Questions 1. Which of the cloth A and cloth B can be used as possible source of evidence in the crime? Why? 2. Which property of matter did you use in making your observation?

Time (min The investigator used one of the following substances in this experiment. Melting and Boiling Points of Four Substances Melting Point Boiling Point (°C) Substance (°C) 1 20 100 40 140 3. 70 140 80 160 Which of these substances was used in this phase change investigation? A. Substance 2 B. Substance 4 C. Substance 3 O D. Substance 1

Which of the statements below are TRUE regarding the mean and standard deviation? I.    As the number of measurements increases, x̄ approaches μ if there is no random error.II.    The square of the standard deviation is the average deviation.III.    The mean is the center of the Gaussian distribution.IV.    The standard deviation measures the width of the Gaussian distribution.

Which of the following statements about lab safety is FALSE?   a.Use of contact lenses is not allowed even when safety goggles are used during experiment. b.All chemicals in the laboratory should be considered dangerous. c.Each reagent should have its own designated pipette. d.Any excess reagents used should be returned to the reagent bottle.

Could you help me with question 2, please?

When purifying a sample of aspirin that was produced in the lab, the impure aspirin sample should be dissolved in a very cold solvent, so that solid impurities can be filtered and analyzed the next day or the next week. True or False?

Instructions: a. Gather all the materials needed. b. Put the rice in a bowl then add 2 liter of water. c. Wash the rice with your hands. Leave the water to settle for 1 minute. What did you observe? d. Slightly tilt the bowl to pour out some water e. Observe then answer the following question in your activity notebook: 1. Describe your mixture? 2. How did you separate the impurities from the rice before cooking? 3. What happened to the rice? Why? 4. What happened to the impurities (husk etc.)? Why? 5. Can the solid particles be separated from the water without letting it settle at the bottom of the bowl? Why? HEAVY AND LIGHT LIQUIDS! LESSON CONGEPT:

TRUE OR FALSE __________ 6. Glassware is clean when no water droplets cling to the inner wall of the vessel. __________ 7. When smelling the odor of a chemical substance, fan your hand over the substance toward your nose which should be centimeters away from the substance. __________ 8. An accident as simple as breaking a beaker containing distilled water in the sink does not need to be reported to the laboratory instructor. __________ 9. Students should turn off cell phones, iPads, and other electronic devices during the laboratory class. __________ 10. It is a good laboratory protocol to call other students’ attention when they do not practice good laboratory safety procedures.

Which PPE should the experimenter wear when performing the experiment in the lab? O Apron Flame-resistant lab coat Nitrile gloves Face shield O Goggles

None

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8 - 14 please

New August 3, 2021. Sampling is a second step analytical methodology, it means Select one: O a. Gathering a sample that is characteristic of the analyte(s) O b. Three of these O c. Defining replicates samples O d. Collecting any sample of the substance to be analyzed e. Collecting a lot of samples of substance by any method.

can you please do it

I need help understanding how to do this, can you please show me how you get the CFU/mL

What is the answer of this?

I need help with question 2?

Concentrated sulphuric acid is used in this experiment to O help the crystal growth of acetylsalicylic acid speed up the reaction of aspirin synthesis increase the activation energy O avoid impurities getting trapped into the aspirin crystals P Type here to search

Which of the following statements is incorrect? *     A. Storing food inside a chemical cabinet is not allowed. B. A chemical can still be stored in a container with leaks as long as it has a proper label and cover. C. A chemical that is stored in a cabinet should be properly labeled and covered. D. A personal protective equipment should always be used in handling chemicals.       Odd one out *   A. Ingestion B. Injection C. Physical hazard D. Inhalation