What is the molar concentration of arsenic in a water sample
toxic chemicals in drinking water usually are reported and a safety level specified in units of parts per million (ppm) by mass. what is the molar concentration of arsenic in a water sample that has 1 ppm arsenic?
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When aqueous solutions of lead(II) ion are treated with potassium chromate solution, a bright yellow precipitate of lead(II) chromate, PbCrO4, forms. How many grams of lead chromate form when a 1.80-g sample of Pb(NO3)2 is added to 19.0 mL of 1.06
Your engineering firm decides to build a prototype, and needs screw and nut fasteners as well as resistors and LEDs. There are machinists and electronics technicians available for in-house production.
Liquid sodium can be used as a heat transfer fluid. It's vapor pressure is 40.0 torr at 633 degrees C and 400.0 torr at 823 degrees C. Calculate its heat of vaporization.
At 90 degree celsius, the vapor pressure of acetic acid is 293 mmHg and its vapor pressure at 100 deg. celsius is 417 mmHg. calculate the normal boiling point of acetic acid.
Describe the glassware and the technique you would use to take part of a sample of a solution of concentration 1.00 and make it into a solution of concentration 0.250.
Molecular formula of nicotine which an empirical formula of c3h7n and molecular weight of 162g/mole
A solution of sodium nitrate, NaNO3, in water is 5.181 molar and its density is 1.2680 g mL-1. Calculate the percent, by weight, of sodium nitrate in the solution.
Of the following anions, Br-, CO32-, Cl-, I-, NO3-, NO2-, PO43-, SO42-, SO32-, list those ions that meet the following criteria: Is involved in an oxidation-reduction reaction as part of a confirmation reaction
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