Your test your tap water and find that it contains 45 mg of lead in 1750...
If a sample of tap water contains 400 ppm of Ca2+ and 80 ppm of Mg2+, what is the hardness of this water sample in terms of equivalent concentration CaCO3, in mg/L?
(10)1. Find the concentration in (a) mg/L, (b) ppm, (c) ppb, and (d) moles/L (M), respectively, for thefollowing solution: 2 g of NaCl dissolved in 500 mL of water
2) The EPA has determined that the maximum safe level of nitrate ion in water is 10 ppm. Suppose a sample of tap water was determined to have a nitrate ion concentration of 95 ppb. Assume the density of water is 1.00 g/mL a) What is the concentration of nitrate ion in units of ppm? Is it safe to drink? b) What is the concentration of nitrate ion in units of mg/ml? c) What mass of nitrate ion is in...
thank you!!!! 3) A solution contains 3.75 x 102 mg/mL of A (MW=220 g.mol1). This corresponds to a concentration (wt/vol) of: d) 1.70 x 103 ppm c) 37.5ppm b) 1.70 ppb a) 0.0375 ppb
A) Calculate the molality of a sucrose solution made by dissolving 73.1 grams sucrose into 55.3 grams water. The molar mass of sucrose is 342.2 g/mol. Record your answer in scientific notation using 3 significant figures. Use * for the multiplication symbol. B) A sodium hydroxide solution that contains 55.5 grams of NaOH per L of solution has a density of 1.14 g/mL. Calculate the molality of the NaOH in this solution. Record your answer to 2 decimal spaces. C)...
Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0012 % Pb by mass. What volume of the water in milliliters contains 155 mg of Pb? (Assume that the density of the solution is 1.0 g/mL.) Express your answer using two significant figures.
Flint, Michigan faces a serious water contamination crisis with high levels of lead (Pb) found in the water. The EPA has a limit of 0.015 mg/L. Express this concentration in units of ppb. Assume the water has a density of 1 g/mL.
To pH of 8.3 To pH of 4.5 0 320 Alkalinity. Wastewater Problem. Determine the alkalinity in mg/L CaCOs for DI water and tap water based on the number of digits (digits= mg/L CaCO3 in 100 ml) Assuming that 25mg/L of filter alum [Al2(SO4)3-14.3 H2O] with MW-600 was used for coagulation, determine the total amount of alkalinity consumed in mg/L CaCOs from coagulation and flocculation. Is the amount of alkalinity consumed from coagulation less than, equal to, or greater than...
The Odessa water report states 0.44 ppm nitrate and 4.1 ppb lead as inorganic contaminants. a) how many micrograms of each contaminant are contained in 1 mL of water? b) give the concentration of each contaminant in mol/L
3-1) A water sample contains 10 mg NO3-/L. What is the concentration in (a) ppmm, (b) moles/L, (c) mg NO3--N/L, and (d) ppbm? Assume density of water solution = 1 kg/L Please show all the calculations! All answers in 3 significant digits (4 if the number starts with “1”)