If the concentration of gold in seawater is 2.0 milligram per ton of sea water and...
If the concentration of gold in seawater is 2.0 milligram per ton of sea water and the mass of the ocean is 1.5 × 1018 tons, how much gold is in the ocean? give answer in 2 significant figures
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If the concentration of gold in seawater is 2.0 milligram per
ton of sea water and...
use correct significant figures Seawater has a concentration of 0.60 M NaCl. The acceptable amount of...
use correct significant figures
Seawater has a concentration of 0.60 M NaCl. The acceptable amount of NaCl in drinking water is 9.0 g/L. How much pure water should be added to 2.50 L of seawater for it to be safe for human consumption? Show your work Final Answer
1. You need to lift three tons (one ton 2000 pounds) of water per minute from...
1. You need to lift three tons (one ton 2000 pounds) of water per minute from a hole 26 feet deep. a) How much work needs to be done in one minute, in any units? b) Express this work done in one minute in metric units of Joules. c) How many horsepower must your pump motor provide? d) Express this in metric units of power.
1) How many moles of water, H2O, contain 2.0×1022 molecules of water? Express the quantity in...
1) How many moles of water, H2O, contain 2.0×1022 molecules of water? Express the quantity in moles to two significant figures. Moles of water = ___________ mol 2) In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chlorine present in 140 g of chlorine gas. Express the quantity in moles to three significant figures. Moles of chlorine gas = ___________ mol 3) Sodium hydroxide, NaOH, is a strong...
1. The octanol-water partition coefficient (Kow) for maleic acid (C4H4O4) is 0.32. Determine the equilibrium concentration...
1. The octanol-water partition coefficient (Kow) for maleic acid (C4H4O4) is 0.32. Determine the equilibrium concentration (in mol/L) of maleic acid in octanol, if the equilibrium concentration of maleic acid in water is 4.53 x 10-2. Report your answer to three significant figures in scientific notation. b) The octanol-water partition coefficient (Kow) for 4-methylphenol (C7H8O) is 93.33. At equilibrium, the concentration of 4-methylphenol (C7H8O) was found to be 6.32 x 10-3 M in octanol. Determine the mass (in g) of...
1. The octanol-water partition coefficient (Kow) for 1,2-diphenylhydrazine (C12H12N2) is 21.88. Determine the equilibrium concentration (in...
1. The octanol-water partition coefficient (Kow) for 1,2-diphenylhydrazine (C12H12N2) is 21.88. Determine the equilibrium concentration (in mol/L) of 1,2-diphenylhydrazine in octanol, if the equilibrium concentration of 1,2-diphenylhydrazine in water is 6.23 x 10-3. Report your answer to three significant figures in scientific notation. Submit Answer Tries 0/13 2. The octanol-water partition coefficient (Kow) for trimethylamine (C3H9N) is 1.45. At equilibrium, the concentration of trimethylamine (C3H9N) was found to be 5.57 x 10-1 M in octanol. Determine the mass (in g)...
The octanol-water partition coefficient (Kow) for trichloromethane (CHCl3) is 93.33. Determine the equilibrium concentration (in mol/L)...
The octanol-water partition coefficient (Kow) for trichloromethane (CHCl3) is 93.33. Determine the equilibrium concentration (in mol/L) of trichloromethane in octanol, if the equilibrium concentration of trichloromethane in water is 6.26 x 100. Report your answer to three significant figures in scientific notation. Submission not graded. Use fewer digits. Tries 1/3 Previous Tries (5.84x10^4mol/L) is wrong 2. The octanol-water partition coefficient (Kow) for 1,3,5-trichlorobenzene (C6H3Cl3) is 30902.95. At equilibrium, the concentration of 1,3,5-trichlorobenzene (C6H3Cl3) was found to be 4.29 x 10-1...
Problem 11.15 A 0.30 kg mass at the end of a spring oscillates 2.0 times per second with an amplitude of 0.13 m Pa...
Problem 11.15 A 0.30 kg mass at the end of a spring oscillates 2.0 times per second with an amplitude of 0.13 m Part A Determine the speed when it passes the equilibrium point Express your answer to two significant figures and include the appropriate units. HO? Value Units Submit quest Answer Part B Determine the speed when it is 0.12 m from equilibrium Express your answer to two significant figures and include the appropriate units. PA OG? Sunt Part...
Calculate the total amount of Na+ (in grams) in the ocean (see Table 4.7). The mass of seawater =...
Calculate the total amount of Na+ (in grams) in the
ocean (see Table 4.7). The mass of seawater = 1.4 x
1024g.
Table 4.7 Average Composition of Water in Streams and in the Oceans in micrograms per gram Seawater Elemens Classificationr S Seawaler erichm 1.7×10-a MORT 3x10-, 56.7 1 × 10 1 × 10-3 2 x10 0.02 6.3 x 10 1.6 × 10 108 x10 1714 1.29 x 10 5.0 × 10, 2×10-2 7.1 ×10-2 90×101 243 1.95 x0 200...
Chemists often use molarity M, in moles/liter, to measure the concentration of solutions. Molarity is a...
Chemists often use molarity M, in moles/liter, to measure the concentration of solutions. Molarity is a common unit of concentration because the volume of a liquid is very easy to measure. However, the drawback of using molarity is that volume is a temperature-dependent quantity. As temperature changes, density changes, which affects volume. Volume markings for most laboratory glassware are calibrated for room temperature, about 20∘C. A 2.500×10−2M solution of NaCl in water is at 20.0∘C. The sample was created by...
Week 7 Homework ± Convert between Units of Concentration 25 of 29 Review | Constants |...
Week 7 Homework
± Convert between Units of Concentration
25 of 29
Review | Constants | Periodic Table
Chemists often use molarity MM, in moles/litermoles/liter, to
measure the concentration of solutions. Molarity is a common unit
of concentration because the volume of a liquid is very easy to
measure. However, the drawback of using molarity is that volume is
a temperature-dependent quantity. As temperature changes, density
changes, which affects volume. Volume markings for most laboratory
glassware are calibrated for room...
use correct significant figures
Seawater has a concentration of 0.60 M NaCl. The acceptable amount of NaCl in drinking water is 9.0 g/L. How much pure water should be added to 2.50 L of seawater for it to be safe for human consumption? Show your work Final Answer
1. You need to lift three tons (one ton 2000 pounds) of water per minute from a hole 26 feet deep. a) How much work needs to be done in one minute, in any units? b) Express this work done in one minute in metric units of Joules. c) How many horsepower must your pump motor provide? d) Express this in metric units of power.
1. The octanol-water partition coefficient (Kow) for 1,2-diphenylhydrazine (C12H12N2) is 21.88. Determine the equilibrium concentration (in mol/L) of 1,2-diphenylhydrazine in octanol, if the equilibrium concentration of 1,2-diphenylhydrazine in water is 6.23 x 10-3. Report your answer to three significant figures in scientific notation. Submit Answer Tries 0/13 2. The octanol-water partition coefficient (Kow) for trimethylamine (C3H9N) is 1.45. At equilibrium, the concentration of trimethylamine (C3H9N) was found to be 5.57 x 10-1 M in octanol. Determine the mass (in g)...
Problem 11.15 A 0.30 kg mass at the end of a spring oscillates 2.0 times per second with an amplitude of 0.13 m Part A Determine the speed when it passes the equilibrium point Express your answer to two significant figures and include the appropriate units. HO? Value Units Submit quest Answer Part B Determine the speed when it is 0.12 m from equilibrium Express your answer to two significant figures and include the appropriate units. PA OG? Sunt Part...
Calculate the total amount of Na+ (in grams) in the
ocean (see Table 4.7). The mass of seawater = 1.4 x
1024g.
Table 4.7 Average Composition of Water in Streams and in the Oceans in micrograms per gram Seawater Elemens Classificationr S Seawaler erichm 1.7×10-a MORT 3x10-, 56.7 1 × 10 1 × 10-3 2 x10 0.02 6.3 x 10 1.6 × 10 108 x10 1714 1.29 x 10 5.0 × 10, 2×10-2 7.1 ×10-2 90×101 243 1.95 x0 200...
Week 7 Homework
± Convert between Units of Concentration
25 of 29
Review | Constants | Periodic Table
Chemists often use molarity MM, in moles/litermoles/liter, to
measure the concentration of solutions. Molarity is a common unit
of concentration because the volume of a liquid is very easy to
measure. However, the drawback of using molarity is that volume is
a temperature-dependent quantity. As temperature changes, density
changes, which affects volume. Volume markings for most laboratory
glassware are calibrated for room...
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