Analysis of the water content of a lake found in the desert showed that it contained...
Analysis of the water content of a lake found in the desert showed that it contained 17.5 percent chloride ion, and had a density of 1.23 g/mL. What is the molarity of the chloride ion in the water?
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Analysis of the water content of a lake found in the desert
showed that it contained...
An analysis of 15.0 g of compound containing CHN and O showed that it contained 9.53480.900...
An analysis of 15.0 g of compound containing CHN and O showed that it contained 9.53480.900 3 H 1.391 g N. and the remainder cxygen. What is the empirical formula of the compound! O a CsH7NO2 b. CgHoNOZ Oc C2H4NO d. CHENO OCH NO QUESTION 11 560.0 ml of water is added to 450.0ml of a 0.746 M aqueous solution of C3H803. The resulting molarity of the solution is 2.0.414 M Ob 0332 M O c 0.928 M 0.545M Od...
4.6781600 107 100 3x10-4 8. Some lake water is found to contain 5.00 ppm of methyl...
4.6781600 107 100 3x10-4 8. Some lake water is found to contain 5.00 ppm of methyl mercury, Hg(CH3)2. a) What is the concentration of methyl mercury in weight percent? moss. - 9 Pom - Mass Soule Hg(CH) 10 - 0 1 +1008x2)) x2 = 230.658, 50. S 330. 688 5 Solution 3.00 230.658 106 mais solution DI 5.00 106. 030.656 → mass soulion 230 Mats Solution 5.00 *10-6 b) Assuming the density of the lake water is 1.00 g/mL, what...
A sample of seawater from a tidal estuary was found to contain a concentration of 825...
A sample of seawater from a tidal estuary was found to contain a concentration of 825 mg of chloride ion per kg of seawater. If the density of the sample was 1.035 g/mL, what is the molarity of the chloride ion?
I circled the right answer 19) Water from University Lake was analyzed for its Fe content....
I circled the right answer
19) Water from University Lake was analyzed for its Fe content. A 25.0-mL sample of lake water was acidified with nitric acid and treated with excess KSCN to form a red complex. (KSCN itself is colorless.) The solution was then diluted to 100.0 mL and put in a 1.00 cm pathlength cell, where it yielded an absorbance of 0.545. For comparison, a 10.0-mL reference sample of 6.80 x 10 M Fe was treated with HNO3...
In a coulometric Karl Fischer water analysis, 50.00 mL of methanol (no residual water) that contained...
In a coulometric Karl Fischer water analysis, 50.00 mL of methanol (no residual water) that contained 2.930 g of a water-containing sample required 5398 C to generate enough iodine to react with all of the water in the sample. Find the percent by mass of water in the sample.
1. A 0.4187 g sample of a pure soluble chloride compound is dissolved in water, and...
1. A 0.4187 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. The mass of the resulting AgCl is found to be 0.9536 g. What is the mass percentage of chlorine in the original compound? ________% 2. A student determines the calcium content of a solution by first precipitating it as calcium hydroxide, and then decomposing the hydroxide...
1) A student added 56.4 grams of barium nitrate to 894 grams of water. The resulting...
1) A student added 56.4 grams of barium nitrate to 894 grams of water. The resulting solution had a density of 1.12 g/ml. What is the weight perfect, molarity, and molarity of the solution? 2) A student evaporated 545 ml of a .523M sodium chloride solution down to a volume of 275 ml. What is the molarity of this final solution?
A bottle of aqueous KCl solution was found on the shelf at work. The label indicated that...
A bottle of aqueous KCl solution was found on the shelf at work. The label indicated that it contained 23.50 wt% KCl and had a density of 1.1536 g/mL. The concentration of this solution in molarity is: (a) 0.2765 M (b) 3.348 M (c) 12.20 M (d) 3.636 M
If a 150 mL sample of water from a lake is found to contain 1.7 μg...
If a 150 mL sample of water from a lake is found to contain 1.7 μg of arsenic (As), what is the concentration of arsenic in the sample in parts per billion (ppb)?
A solution of ethylene glycol in water at 20 degrees celsius has a mass percent of...
A solution of ethylene glycol in water at 20 degrees celsius has a mass percent of 9.78% of ethylene glycol with a density of 1.0108 g/mL. The freezing point depression constant for water (solvent for all solutions) is Kf=-1.86 percent celsius kg/mol and the boiling point elevation constant is Kb=0.512 degrees celsius kg/mol. The density of neat water at 20.0 degrees celsius is 0.9982 g/mL. Answer the following: 1. What is the molarity of the solution? 2. What is the...
An analysis of 15.0 g of compound containing CHN and O showed that it contained 9.53480.900 3 H 1.391 g N. and the remainder cxygen. What is the empirical formula of the compound! O a CsH7NO2 b. CgHoNOZ Oc C2H4NO d. CHENO OCH NO QUESTION 11 560.0 ml of water is added to 450.0ml of a 0.746 M aqueous solution of C3H803. The resulting molarity of the solution is 2.0.414 M Ob 0332 M O c 0.928 M 0.545M Od...
4.6781600 107 100 3x10-4 8. Some lake water is found to contain 5.00 ppm of methyl mercury, Hg(CH3)2. a) What is the concentration of methyl mercury in weight percent? moss. - 9 Pom - Mass Soule Hg(CH) 10 - 0 1 +1008x2)) x2 = 230.658, 50. S 330. 688 5 Solution 3.00 230.658 106 mais solution DI 5.00 106. 030.656 → mass soulion 230 Mats Solution 5.00 *10-6 b) Assuming the density of the lake water is 1.00 g/mL, what...
I circled the right answer
19) Water from University Lake was analyzed for its Fe content. A 25.0-mL sample of lake water was acidified with nitric acid and treated with excess KSCN to form a red complex. (KSCN itself is colorless.) The solution was then diluted to 100.0 mL and put in a 1.00 cm pathlength cell, where it yielded an absorbance of 0.545. For comparison, a 10.0-mL reference sample of 6.80 x 10 M Fe was treated with HNO3...
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