What can you infer about ancient Egypt and Mesopotamia from the fact that they needed dams for irrigation?

Q: use ion exchange method in analytical separation to separate mercury and nickel from polluted water…

A: Basically the river bodies are polluted by the heavy metals like Cadmium,Mercury,nickel. Mainly…

Q: A 25mL sample of 2.0mol/L sodium oxalate is reacted with 30mL of 1.50 mol/L copper (II) nitrate…

A: Given that 25 mL sample of 2.0 mol/L sodium oxalate is reacted with 30 mL of 1.50 mol/L copper (II)…

Q: Explain how a geologist might use the flame test to identify a cation from different mineral…

A: A question based on qualitative analysis, which is to be accomplished.

Q: Identify the dependent and independent variables for the following situations: water consumption and…

A: Interpretation: The dependent and independent variables for the following situations are to be…

Q: READ THIS: When you hear that NASA's space probes are looking for "evidence of life" on other…

A: Given: The diagram of hydrogen bonding in water molecules is given. We have to find the types of…

Q: Dilution was “the solution to pollution” for much of human history. What is the meaning of this…

A: Dilution was "the solution to pollution" for much of human history, when populations were small.…

Q: How different are saline soils from calcareous soils?

A: SOLUTION: Step 1: Calcareous soils contain free CaCO3, undissolved lime with a pH ranging from 7.3…

Q: Toxic Cr(VI) can be precipitated from an aqueous solution by bubbling SO2 through the solution. How…

A: Given Volume = 3.00 × 108 L  molarity = 4.00×10-2 mM

Q: Technician A says that detergents keep oil from forming wax deposits under cold temperatures.…

A: Detergents are amphiphilic substances with polar and non polar tails. Detergents are very useful in…

Q: Jin wanted to improve the capacity of his sandy soil sample in terms of holding water, and to…

A: Soil: Soils are the found at surface which are mixture of so many living organism, water, organic…

Q: 3) Identify following groups as EDG or EWG OMe

A: EDG or electron donating groups ar those which donates its electrons to its bonded atom or group.…

Q: A water sample is found to contain the pollutant chlorobenzene with a concentration of 15 ppb (by…

A: Given, The concentration of chlorobenzene present in the water sample = 15 ppb (by mass) The amount…

Q: A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration…

A: The amount of solute which is dissolved in given amount of solvent is known as concentration.

Q: If you were to add 22 grams of medium to 1000 ml of distilled water. How many grams should you weigh…

A: Volume of water = 1000 mL  Mass of medium = 22 g  Mass required for 250 mL  = ?

Q: Discuss the advantages and disadvantages of using chlorine as disinfectant.

A: An antimicrobial agent that can be applied to the surface of some things in order to eradicate the…

Q: Scientists noticed that the ozone layer was thinning.What was occurring at the same time?

A: Scientists noticed that the ozone layer was thinning and what happens on  at the same time has to be…

Q: Explain the following briefly a.) Why is ‘‘distillation’’ a purifying technique? Cite evidences

A:

Q: Answer the following questions.  1. What are the benefits of green chemistry? 2. How can…

A: 1. If one follows green chemistry guidelines, then environmental benefits are:− there is check on…

Q: Finely divided, partially decomposed organic matter founc in soils is called Select one: a.…

A: Finely divided partially decomposed organic matter found in solid is called as,

Q: What are the uses of recrystallization, decolorization, and sublimation?  Give  examples of each.

A: Recrystallization is process of removing insoluble solid impurities from an organic compound. The…

Q: Which of the following variables does absorbance not depend upon?   A. Molar absorptivity of the…

A:

Q: 4) Does it matter if the coin is heads or tails? Why or why not?

A: Surface tension is the inclination of liquid surfaces to contract into the smallest possible surface…

Q: Ca(OH), , NAHCO, MgSOH2O Dr. Marwa Nizar AL-Hadhaa tiniversity College

A:

Q: what are refractory materials?

A: Materials that are inorganic non-metallic materials are called refractories.  They can withstand…

Q: Give at least 2 significant examples of chemical reactions that falls on change in intrinsic…

A: (1) Intrinsic properties are those properties in which properties not depend on internal amount of…

Q: Which of the following is a good conductor of electric current? plastic silver wood rubber

A: • The materials which allow electric current to pass through them easily are called good…

Q: READ THIS: When you hear that NASA's space probes are looking for "evidence of life" on other…

A:

Q: The dissolved coffee in hot water can be separated by which technique? a. using a magnet b.…

A: There are methods used to seperate two mixtures based on their properties. These methods depends on…

Q: Differentiate powder from granules? Make it in table form.

A:

Q: You can get a "water clock", which works by simply adding water to it. How must it work?   a. The…

A: a. The energy does not come from water. Water's energy is too low to run a device. Hence, this…

Q: What category of environmental chemistry that deals with chemical phenomena in all types of water…

A: In environmental chemistry, natural process, such as biodegrading, photosynthesis, water cycle, are…

Q: Draw the different apparatus you see in the laboratory and give the functions of each.

A: The apparatus we use in the laboratories are shown below,

Q: What is the method of analysis for the chemical pollutants of soil pollution?

A: The most common soil pollutants are heavy metals such as Lead (Pb), Mercury(Hg), Arsenic(As) ,…

Q: 21) OH +

A: In this reaction, the cross-aldol reaction will take place. First, the base abstract the alpha (α)…

Q: 4. Preservatives that are usually found in cured meats, bacon, ham, corned beef and hot dogs. A.…

A: Concept based on Food preservatives and their uses.

Q: 275g. The soil

A: Mass of saturated pores= 275gm After drying  24 hours ,sample weight = 200gm

Q: 5. Two students attempt to etch their initials on a gold plate using hydrochloric acid. 6. A student…

A: By calculating the cell potential we can determine the reaction spontaneity.

Q: The use of living organisms to help clean up areas of pollution is known as

A: The living organisms which is used in clean up the area of pollution is Bioremediation.…

Q: Toxic Cr(VI) can be precipitated from an aqueous solution by bubbling SO2 through the solution. How…

A: Answer: 1.44 × 106 g of SO2 is required.

Q: READ THIS: When you hear that NASA's space probes are looking for "evidence of life" on other…

A: #21: Two different types of bonding can the H and O atoms of H2O molecule can make.  These are…

Q: Is it acceptable to recycle the containers of hazardous chemicals? Why or why not? Explain your…

A: Yes , it is  acceptable to recycle the containers of hazardous chemicals. The residue within empty…

Q: Boron is concentrated mainly in the lungs (0.34 mg), thyroid gland (0.30 mg), spleen (0.26mg), brain…

A: Given that, Amount of boron in lungs = 0.34 mg Amount of boron in thyroid gland = 0.30 mg Amount of…

Q: A first aid manual suggests that vinegar should be used to treat wasp sting and baking soda for bee…

A: Given: A first aid manual suggests that vinegar should be used to treat wasp sting and baking soda…

Q: Explain how hardness of water affects boilers and pipelines.

A: Hardness of water affects boiler very much.  Boiler will be broken or be failed by using hard water.…

Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.