Water that contains 2 mg oxygen per liter or less is termed hypoxic, since at that concentration many aquatic aerobic organisms are unable to survive. How does the depth at which hypoxia is observed change
Answer: Hypoxia is nothing but the environment contains low levels of oxygen. Generally water contains 2mg of Oxygen/Litre. Even though Aquatic aerobic organismas and small creatures lives in deep shallow waters happily.This can be done by Sewage treatment and also by reducing the fertilizers reaching into rivers. If it reaches the SATURATION POINT, the aquatic organisms will die.
Water that contains 2 mg oxygen per liter or less is termed hypoxic, since at that...
Dissolved Oxygen in Aquatic Ecosystems Dissolved oxygen is oxygen trapped in a fluid such as water. Since many living organisms require oxygen to survive, it is a necessary component of water systems such as streams, lakes, and rivers in order to support aquatic life. The dissolved oxygen is measured in units of ppm (parts per million). Examine the data in the table below, showing the amount of dissolved oxygen present and the number of fish observed in the body of...
A water with a pH of 9.0 contains 20 mg/L CO3-2 and 55 mg/L HCO3-. Calculate the alkalinity of the water expressed as meq/L (milli equivalents per liter) and as mg/L as CaCO3.
Sea water contains about 28.0g of NaCl per liter, what is the molarity? What is the molarity of 5.30g of Na2CO, dissolved in 400.0mL solution? How many moles of Na,Co, are in 10.0L of a 2.00M solution?
A fluoridated water supply contains 2 mg/L of F-. What is the maximum amount of Ca2+, expressed in grams per liter, that can exist in this water supply? Ksp (CaF2) = 3.9E-11 Amount of Ca2+ = ____g/L
2. A dose of 41 mg/L of alum is used in coagulating a turbid water at a water treatment plant treating a flow rate of 32 million gallons per day (mgd). The natural alkalinity of the source water is 10 mg/L (as CaCO3). a. Will the alkalinity be completely consumed in the reaction? If not, then how much alkalinity will be left? If so, then what concentration of caustic soda (NaOH) must be added to avoid a change in the...
A 150.0 g sample of ocean water contains 3.5 mg of mercury. How many parts per million of mercury are in the sample? Multiple Choice 15 ppm 23 ppm 24*102 ppm 2.3 * 104 ppm 43 ppm
Data Table 2: Water Hardness Average Volume of EDTA Used (mL) Concentration Ca2+ Ions Per Liter of Water (mol/L) Water Hardness (ppm CaCO3) 3.33 mL 0.00333 mol/L 333.2 ppm Exercise 1 - Questions 1. Based on the analysis of your local water, would you classify its hardness as soft, moderate, hard, or very hard? Explain your answer. 2. Approximately how much calcium would you ingest by drinking eight 8-oz glasses of your local water? Hint: 1 oz (fluid ounce) =...
1.) A 5% (w/v) dextrose IV fluid (D5W) contains 20 mEq K+ per liter of solution. If a patient received 420 mL of this IV solution, how many millimoles of K+ were delivered ? 2.) A 25.0 mL multidisciplinar vial of a medication is available containing 500mg of a drug dissolves in normal saline. What is % (w/v) concentration of this preparation? 3.) How many grams of insulin are present in 5.0g if 0.450% (w/w) solution? Can you please show...
4) Imagine you have a fish tank with a volume of 0.25 cubic meters. Initially the water in it has an ammonia concentration of 0 parts per million or ppm (1 ppm means there is 1 g of ammonia out of every million g of water in the tank). a. What is the mass of water in the tank (assume that the water has a mass of 1 kg per liter)? b. If the water in the tank had a...
1) A common dosage for a particular medicine is 0.40 mg per mg of a body weight. a tablet contains 25.0 mg of this medicine. how many tablets must be taken by a person weighing 61.5 kg? 2) which of the compounds is expected to be more soluble in water than in carbon tetrachloride? a) NaBr. b) CS2. c) C6H6. 3) which substance will be a strong electrolyte in aqueous solution? a) CO2. b) CCl4. c) KBr. d) CH3OH please...