It is recommended that drinking water contain 1.6ug/ml (parts per million) flouride (F-) for prevention of tooth decay. Consider a reservoir with a depth of 30.0 m and a diameter (diameter = 2 r) of 7.60 x10^4 m. (The volume is pi r^2 h) Calculate the amount of F- in grams that were added to the reservoir to give 1.6 ug/ml. How many grams of sodium flouride NaF, contain this much flouride? Note: NaF ---- Na+ + F-

Q: 100 90 NANO 70 80 CaC 50 60 Pb(NO)2 40 NaCl 30 KCI 20 10 KCIO, Ce,(SO) Solubility (g of salt in 100…

A: The power of a solid, liquid, or gaseous chemical compound (referred to as the solute) to dissolve…

Q: How much solid sodium chloride do you need to make 300.0 mL of a 150. mM NaCl solution in water?

A:

Q: The Olympic swimming pool in Tokyo holds 3750 cubic meters [m^(3)] of water. To keep the water safe…

A: Given ,Objective :To determine mass of chlorine added .

Q: A chemistry student needs 30.00 g of 2-ethyltoluene for an experiment. She has available 0.50 kg of…

A: Given  Required data - mass of 2-ethyltoluene = 30.0 g   Available data -  mass of solution =…

Q: You need to make 500 mL of 5.0% (w/v) NaOH solution. You have a bottle of 10.0% (w/v) NaOH solution,…

A:

Q: Calculate the mass percent (m/m) of a solution prepared by dissolving 41.98 g of NaCl in 151.7 g of…

A: Q.1:  Given mass of solute, NaCl = 41.98 g  mass of solvent, H2O = 151.7 g  => Mass of solution =…

Q: THE ACCEPTABLE LEVEL OF COPPER THAT CAN BE FOUND IN DRINKING WATER IS NO MORE THAN 1.3 ppm. A SAMPLE…

A: Given : Safe concentration of copper in drinking water < 1.3 ppm. Mass of water sample = 5000 Kg…

Q: Mass of empty dish: 38.386 grams  Volume of 0.0400 M stock solution: 5.00 mL  Mass of Dish and…

A: Molarity of a solution is moles of solute present in one litre of solution.  Molality of a solution…

Q: 5. The following graph is a calibration curve for the density of an aqueous salt solution versus…

A: The detailed solution is given below.

Q: 1. A 0.68 gram sample of a volatile liquid was heated to 358 K. The gas occupied 265 mL of space at

A: Note: Dear student as per the guidelines only the 1st quetions  is allowed to answer. from ideal gas…

Q: b. Calculate the molarity of the barium chloride solution that you made in your 50.00 ml volumetric…

A: Molarity (M) of a solution is defined as the number of moles of solute dissolved per volume of the…

Q: Which of the following procedures is the most suitable for preparing 500. mL of a 0.120 M aqueous…

A: The volume of the solution is = 500 mL The molarity of the solution is = 0.120 M The molar mass of…

Q: Cedrick and Astrid a 20.00 ml aliquot of grapefruit juice with a 0.165 M NaOH solution to the end…

A: Given data: Volume of  citric acid present in the juice sample =  0.1457g  Volume of titrated in the…

Q: Q4: 50 g of an anti-inflammatory ointment was found to contain 1.1 g of the main active ingredient.…

A: Since you have asked multiple type questions, we will solve only first  questions for you. If you…

Q: Review Topica) References) Use the References to access important values if needed for this…

A: The question is based on the concept of mass percentage.   amount of substance present in hundred…

Q: Refill the burette with the standardized 0.5 M NaOH solution provided. Record the initial volume of…

A: Moles of NaOH required = Moles of vinegar (acetic acid) neutralized

Q: nist prepares a solution of copper(II) sulfate (CuSO4) by measuring out 66.8 µmol of copper(II)…

A: Molarity is defined as number of mole of substance divide by volume of solution in liter

Q: A student creates a calibration plot for serial dilutions of Cu(NO3)2. A graph of concentration in M…

A: Given : y = 0.345x - 0.11 Mass of solution = 100 grams  To find  :  Grams of Cu ( NO3 )2 Grams of…

Q: In separate beakers, 100 grams of NaCIO3, KNO3, KBr and NaCl were mixed with 100 grams of water at…

A: The amount of solute present in a 100 g of solvent is known as solubility. The solubility of a…

Q: Seawater has a concentration of 0.60 M NaCl. The acceptable amount of NaCl in drinking water is…

A: Moles of NaCl in 1L of 0.6M water = Volume × molarity = 0.06 moles.Mass of sodium = Moles × molar…

Q: 100 90 NaNO 80 70 60 CaCl 50 Pb(NO)2 40 NaCI 30 KCT 20 KCIO 10 Ce,(SO 0 10 20 30 40 50 60 70 80 90…

A:

Q: Too much manganese in drinking water can cause the following undesirable effects: black to brown…

A:

Q: A chemist must dilute 62.6mL of 2.81M aqueous sodium thiosulfate Na2S2O3 solution until the…

A: Here given, Initial volume (V1) = 62.6 mL Initial strength (S1) = 2.81 M Final volume (V2) = ? Final…

Q: You decide it is time to clean your pool since summer is quickly approaching. Your pool maintenance…

A: Given that : The concentration of chlorine (Cl2)= 4.08×10−5 M. The molar mass of chlorine (Cl2) is…

Q: Calculate the percent mass per volume, % (m/v), of a dextrose solution containing 7.00 g of dextrose…

A: A dextrose solution containing 7.00 g of dextrose in 3.00 × 102 mL of solution .We have to…

Q: Wastewater from a cement factory contains 0.430 g of Ca²+ ion and 0.0890 g of Mg2+ ion per 100.0 L…

A: Given,mass of Ca2+ = 0.430 gmass of Mg2+ = 0.0890 gvolume of solution = 100.0 Ldensity of solution =…

Q: Monique has a pot that contains 7 liters of brine (salt water) at a concentration of 110 g/L. She…

A: The number of moles of solute on per liter of solution is known as concentration.

Q: The maximum safe level of a chemical in drinking water is determined to be 52 μg per kg of water.…

A:

Q: Calculate the final concentration in %(m/v) of a solution made by adding 325 mL water to 180. mL of…

A: Mass by volume percent represent the percentage ratio of mass of solute to the volume of solution.

Q: 2. A water sample has 10 µg/L Hg2+ and a density of 1.0 g/mL (atomic weight of Hg = 200.59).…

A: a) 1μg/L = 1ppb    so, 10μg/L = 10ppb b) Molecular weight = 200.59 A molecular weight of 200.59…

Q: You have available a stock solution of 1.500M CuSO4. You need to prepare 500.0mL of 0.3000M CuSO4…

A: The solution is given below -

Q: 17- If 125 grams of solid sucrose (C12H22011) with 93% purity by mass is dissolved in 250.0 mL of…

A: Purity of sucrose = 93%  Weight of sucrose = (93/100) x 125 = 116.25 gram  Molar mass of sucrose =…

Q: 114.7 mg of NaCl (MM=58.44 g) is dissolved in 246.42 L of water. What is the concentration of Na+…

A: A numerical problem based on concept of solutions, which is to be accomplished.

Q: Calculate the mass of solution the student should use. If there's not enough solution, press the "No…

A:

Q: I had a 6.00 M NaOH solution and I diluted it to a 50mL solution of 0.300 M NaOh solution by adding…

A: According to the unit conversion, 1 mL is equal to 10-3 L. The number of moles in the 20 mL of the…

Q: A student prepares a 1.2mM aqueous solution of crotonic acid C3H5CO2H. Calculate the fraction of…

A: Here we are required to find the fraction of crotonic acid dissociated.

Q: A 870. mL solution was made by mixing 419. mL of hexane, which has a density of 0.66 g/mL, and 469.…

A: Given ,Volume of solution = 870. mLvolume of hexane = 419. mLvolume of toluene = 469. mL

Q: A sample of an industrial waste water is analyzed and found to contain 48.6 ppb Ni2+. How many grams…

A:

Q: If 19.6 grams of an aqueous solution of sodium bromide,NaBr,contains 1.92 grams of sodium…

A: Given: Mass of Sodium bromide=1.92 g Mass of solution=19.6 g  To Find: weight/weight % Solution:…

Q: In the lead content analysis of a wastewater sample, 50.00 mL of the original sample was taken and…

A:

Q: A chemist prepares a solution of sodium carbonate (Na₂CO3) by measuring out 86. μmol of sodium…

A: A homogeneous mixture of two or more substances is known as a solution. The species which present in…

Q: The EPA's secondary standards for contaminants that may cause cosmetic or aesthetic effects in…

A: The upper limit of chloride according to EPA's secondary standards for contaminants = 250 mg/L…

Q: Too much manganese in drinking water can cause the following undesirable effects: black to brown…

A: Given:

Q: The minimum level of mercury levels in water considered safe is 1 part per billion (ppb) by weight.…

A: The volume of water is = 8.52 L The concentration of mercury in the water sample is = 0.59 parts per…

Q: An aqueous solution of chromium(III) sulfate,Cr (SO4)3 , contains 8.67 grams of chromium(III)…

A: Recall the expression of weight/weight percent of a solution                         ww% of…

Q: Calculate the mass/volume percent composition, or % (m/V), of 4.50 x 10' mL of solution containing…

A:

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.