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- 1. These are components of a sample that is of interest to the chemist, usually taken as a representative of a bigger sample.A. Aliquot portion B. Analyte C. Distillate D. Assay2. The Mercaptan content of household gas supplies is monitored continually to ensure that the gas has a sufficiently obnoxious odor to warn of dangerous leaks, what analytical method should be applied to ensure this feat? A. Gravimetric B.Spectroscopic C.Volumetric D. Electroanalytical 3. A branch of chemistry that deals on the analysis, techniques of instrumentation and data interpretation of experimental results.A. Physical Chemistry B. BiochemistryC. Analytical ChemistryD. Inorganic Chemistry4. It is a chemical classification that can be used for general procedures that require stringent quality specifications and a purity of ≥95%.A. Laboratory gradeB. ACS gradeC. Technical gradeD. Special purpose5.These are balances that have a maximum loading of 10 to 30 g with a precision of 60.01 mgA.…Information about a Water SamplerQuestions: 19 20 21 22 23 24 25 27
- Question 3 please. It's a practice exam. Will post the answer with it.1. In the stone age, it took this long to cut down a tree?() 1 hour, 1 day, 1 week or 1 month?2. An Egyptian pharaoh who died in 1324 B.C. was buried with an iron head rest, bracelet, and a dagger. () King Tutankhamen, King Tutankayulatan, King tutankamin or King Tutakayun?3. motorcycle plastic hydraulic lines are made off() brated stainless steel, high carbon steel, medium carbon steel, or low carbon steel?4. This is important for products with moving parts.() Brass, platinum, Bronze or Steel5. used in the hospitals with extra chromium in it to resist the salts in body fluids.() high carbon steel, low carbon steel, stainless steel or mild steels?6. Mobile nutrients like nitrogen are found deeper into the soil profile while non-mobile nutrients like potassium and phosphorous are found at the _____ soil profile.() zero to six inches, composite sample, 24 inches, or Depth?3 نقاط .Titrant is usually in In a conical flask. In beaker. In buret.
- Discuss common sample preservation methods or storage conditions that would ensure sample stability during transportation and in the laboratory.The Mercaptan content of household gas supplies is monitored continually to ensure that the gas has a sufficiently obnoxious odor to warn of dangerous leaks, what analytical method should be applied to ensure this feat? A. Gravimetric 2. B. Spectroscopic C. Volumetric D. Electroanalytical A branch of chemistry that deals on the analysis, techniques of instrumentation and data interpretation of experimental results. A. Physical Chemistry It is a chemical classification that can be used for general procedures that require stringent quality specifications and a purity of 295%. A. Laboratory grade 3. C. Analytical Chemistry B. Biochemistry D. Inorganic Chemistry 4. B. ACS grade C. Technical grade D. Special purpose 5. These are balances that have a maximum loading of 10 to 30 g with a precision of 60.01 mg A. semi-microanalytical B. Microanalytical C. Macrobalances D. Triple Beam Balanceplease refer to image and complete 3.a
- This is not graded, this is review questions. Please answer6. Explain the reason why a laboratory analyst should not return excess or unused chemicals back in their respective reagent bottles.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…