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A chemical analysis of a water sample indicates that the water contains 6.50 times 10^-4 grams...
A 150.0 g sample of ocean water contains 3.5 mg of mercury. How many parts per...
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
if a given water sample contains 10 parts per million phosphate, how many grams of phosphate...
if a given water sample contains 10 parts per million phosphate, how many grams of phosphate would a liter (1,000 g) contain
9) A drinking water plant adds 500 grams of fluoride to a water tank containing 500,000...
9) A drinking water plant adds 500 grams of fluoride to a water tank containing 500,000 liters of drinking water. What is the concentration of fluoride in the water in parts-per-million (ppm)? 10) A bottle of rubbing alcohol contains 75% by mass 2-propanol (C:HsO) in water. What are the mole fractions of 2-propanol and water in the solutions?
Hard water normally contains mineral ions, such as Ca2+ and Mg2+ ions, from minerals that dissolved...
Hard water normally contains mineral ions, such as Ca2+ and Mg2+ ions, from minerals that dissolved in the ground water. For water of low hardness, the concentration of Ca2+ ions is usually expressed as ppm CaCO3 in the water sample. Parts per million (ppm) is defined as one part of solute mass per 1,000,000 parts of solution mass, as shown in the following equation. Please note, the unit of denominator and numerator needs to be the same. Since ppm expresses...
-2t A tank initially contains 10 liters of water and 5 grams of salt. Salt water...
-2t A tank initially contains 10 liters of water and 5 grams of salt. Salt water containing 3+ e grams of salt per liter is pumped into the tank at a rate of 2 liters per minute. The solution of salt water is instantaneously, perfectly mixed and then pumped out at a rate of 2 liters per minute. Determine when, to three decimal places, the concentration of the salt leaving the tank is within 0.01 grams/liter of the salt entering...
(1 point) A tank initially contains 25 liters of salt water solution with 10 grams of...
(1 point) A tank initially contains 25 liters of salt water solution with 10 grams of salt dissolved in it. Salt water containing one gram of salt per liter pours in at the rate of one liter per minute and the well-stired mixture drains out at the rate of 2 liters per minute. How many grams of salt will be in the tank after one minute? Answer: grams of salt.
Problem 2. A sample of water is to be analyzed for solids content. Ten liters of...
Problem 2. A sample of water is to be analyzed for solids content. Ten liters of water are passed through a filter (initial weight of filter is 15 grams). After drying at 105 C, the filter plus residnai weighs 43 grams. Another 10 liters of sample of the same water is evaporated without fitering, yielding a residual mass of 40 grams. The result of the analysis is calcuiated as oilows: a. Tota: Solids of this water is...Grams per liter. b....
18. If the concentration of the herbicide atrazine, commonly used in corn prode a water sample...
18. If the concentration of the herbicide atrazine, commonly used in corn prode a water sample is 0.1 g/L, how many parts per million are present? 19. An elementary school wants to ensure the lead concentration in its soil is less than 100 ppm. If the administration sends a soil sample for analysis and the report indicates a lead concentration of 15,000 μg/g, is this soil concentration under the 100 ppm limit?
Government regulations dictate that for any production process involving a certain toxic chemical, the water in...
Government regulations dictate that for any production process involving a certain toxic chemical, the water in the output of the process must not exceed 7330 parts per million (ppm) of the chemical. For a particular process of concern, the water sample was collected by a manufacturer 16 times randomly and the sample average x was 7338 ppm. It is known from historical data that the standard deviation o is 80 ppm. Complete parts (a) and (b) below. Click here to...
J. (e p) Starting with solld KCI and water, how many grams of KCI are needed...
J. (e p) Starting with solld KCI and water, how many grams of KCI are needed to prepare 3.00 liters of a 2.00 M KCI solution? 4 (20 pt) How of according to the chemical equation below? many moles of phosphine (PHs) are produced for every 4.0 moles of hydrogen that react 5. (10 pt) A 5.95 g sample of AgNOs is reacted with NaCl according to the equation AgNOs + NaCI AgCI+NaNOs to give 4.0 g of precipitate. What...
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
-2t A tank initially contains 10 liters of water and 5 grams of salt. Salt water containing 3+ e grams of salt per liter is pumped into the tank at a rate of 2 liters per minute. The solution of salt water is instantaneously, perfectly mixed and then pumped out at a rate of 2 liters per minute. Determine when, to three decimal places, the concentration of the salt leaving the tank is within 0.01 grams/liter of the salt entering...
(1 point) A tank initially contains 25 liters of salt water solution with 10 grams of salt dissolved in it. Salt water containing one gram of salt per liter pours in at the rate of one liter per minute and the well-stired mixture drains out at the rate of 2 liters per minute. How many grams of salt will be in the tank after one minute? Answer: grams of salt.
Problem 2. A sample of water is to be analyzed for solids content. Ten liters of water are passed through a filter (initial weight of filter is 15 grams). After drying at 105 C, the filter plus residnai weighs 43 grams. Another 10 liters of sample of the same water is evaporated without fitering, yielding a residual mass of 40 grams. The result of the analysis is calcuiated as oilows: a. Tota: Solids of this water is...Grams per liter. b....
18. If the concentration of the herbicide atrazine, commonly used in corn prode a water sample is 0.1 g/L, how many parts per million are present? 19. An elementary school wants to ensure the lead concentration in its soil is less than 100 ppm. If the administration sends a soil sample for analysis and the report indicates a lead concentration of 15,000 μg/g, is this soil concentration under the 100 ppm limit?
Government regulations dictate that for any production process involving a certain toxic chemical, the water in the output of the process must not exceed 7330 parts per million (ppm) of the chemical. For a particular process of concern, the water sample was collected by a manufacturer 16 times randomly and the sample average x was 7338 ppm. It is known from historical data that the standard deviation o is 80 ppm. Complete parts (a) and (b) below. Click here to...
J. (e p) Starting with solld KCI and water, how many grams of KCI are needed to prepare 3.00 liters of a 2.00 M KCI solution? 4 (20 pt) How of according to the chemical equation below? many moles of phosphine (PHs) are produced for every 4.0 moles of hydrogen that react 5. (10 pt) A 5.95 g sample of AgNOs is reacted with NaCl according to the equation AgNOs + NaCI AgCI+NaNOs to give 4.0 g of precipitate. What...
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