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- 1. Which of the following is not a step in preparing a water sample container?a. All sample containers must be dark in colorb. The type of sample container and the level of cleaning required depend on the type of sample to be takenc. All sample containers must be thoroughly cleaned in the laboratory before sampling is carried outd. The number of containers prepared must always be in excess of what is needed, for quality assurance, quality control and reserves 2. The purpose of environmental sample analysis is..a. To determine the origin and concentration of chemicals in the environmentb. To determine the origin, concentration of chemicals and/or pollutants in the environmentc. To determine the concentration of a chemical in the environmentd. To determine the cause and concentration of pollutants in the environment5. Which tablet size and the liquid combination resulted in the fastest dissolution times? A. crushed, room temperature water B. crushed, hot water C. crushed, room temperature vinegar D. broken, hot water E. broken, room temperature vinegar 6. What is the relationship between particle size and the time it takes for the tablet to dissolve? A. direct proportion B. inverse proportion C. combined proportion D. joint proportion 7. Using the activity as a model, how does mechanical weathering (breaking or crushing) contribute to chemical weathering (dissolution)? A. Increases size of particles B. Decreases dissolution time C. Increases surface area D. Both A and B E. Both B and CPhysical Analysis of Water Samples A. WATER POLLUTION VIDEO a. Describe the three categories of water pollution. b. What is eutrophication? What are the uses and effects of eutrophication? c. Describe the emical pollutants in water. FOR PLMYSICAL SCENCE DEPT USE ONLY d. Describe the ways of reducing water pollution.
- It is a quantitative analysis of water use from entry up to discharge in a system. A. Water conservation B. Water footprints C. Water Audit D. Eutrophication青 Service Inte... Sy log_{b}sqrt(b) - Sim... G (Last Day Promotio... O Kronos Workforce... S Maame Acheampo... MIDTERM MODER. [Review Topics] [References] Use the References to access important values if needed for this question. In the laboratory a student combines 20.8 mL of a 0.216 M aluminum acetate solution with 25.2 mL of a 0.681 M zinc acetate solution. What is the final concentration of acetate anion ? Submit Answer Retry Entire Group 5 more group attempts remaining Previous Next 8:41 PM1. Suppose each pair below is mixed well. What comes out as the simplest example of liquid mixing?A. 12 M sulfuric acid solution and 12 M sodium hydroxide solutionB. water with 80% ethanolC. ethane with methaneD. acetic acid and water
- .Pour point define as - 26 O O Sulphur content - 27 A - Lowest temperature at which fuel will flow under cooling. B - Lowest temperature at which fuel will flow under heating. A Depends on source of crude oil and less - on the refining process B - Not Depends on source of crude oil and less on the refining process. .Ash content is - 28 A - organic material in fuel O B - Inorganic material in fuel O OAre Particles Visible? Can it be Filtered? Do Partices Settie? See Tyndal Effect? Example Mixture Solution No saltwater Colloid No Suspension Yes Part 3 Separating Mixtures 15. Since the parts of a moture are combined, they can be separated rather easily. 16. F in the table below to sutmarize the 6 different separation techniques described. Technique Description Separates larger solids from smaller solids by passing them through mesh. Separates magnetic from non-magnetic materials Separates an insolluble solid from a liquid by passing it through a filter. Separates a soluble sold from a liquid by boling off the liquid. Separates a liquid from a soluble solid in solution by boiling and cooling it. Separates mitures of liquids with different boiling points using a condenser. Separates matures of liquids with afferent solubilities using absorbent paper. Part 4 Properties.of Matter 17. Matter can be described by 2 types of properties: and properties 18. A) s a property of matter one can….Pour point define as - A Lowest temperature at which fuel will flow under cooling. B-Lowest temperature at which fuel will flow under heating. A - Depends on source of crude oil and less on the refining process B - Not Depends on source of crude oil and less on the refining process. O O Sulphur content - 54 O .Ash content is - 55 A - organic material in fuel O B - Inorganic material in fuel O
- The solubility of NaCl is 36.0 g in 100 g of H₂O at 20 °C. What is the maximal amount of NaCl that can dissolve in 200 g of H₂O at 20 °C? rosoft olga gamboa Bobby Offer dge retirement a... of Employ... scaux Cave chemistry Painting and reaction ? 83°F Sunny Bobby Offer of Employ... * 14 f5 -m 16 ard tion 17Wet deposition is a continuous process, while dry removal of air pollutants can be realized only in the presence of precipitation. a. True b. False17.100 ml of 5:3:2 ethylene: chloroform: isoamyl alcohol 18. Convert 50 ppm to g/L 19. Convert 50 ppm to mg/L 20. Convert 5 ppb to ul/l
