Chemistry
Concentration 15.8 mg/L Final Volume 100.0 mL What is the concentration of phosphate in the original lake water sample if the unknown lake water sample in the option has been diluted by taking 25.0 mL of lake water and diluting it to the indicated final volume? •Chemistry...
Chemistry
Water treatment plans must reduce phosphate levels to 3.2 micromoles PO4^3-/L before the water is considered drinkable. If water from Lake A is determined to have a phosphate concentration of 0.419 mg PO4^3-/L, does it meet this allowable standard for drinking water?
Chemistry
Don't you have times 100/25 by 1000mL/1L to get it to mg/L?
Chemistry
Concentration 15.8 mg/L Final Volume 100.0 mL What is the concentration of phosphate in the original lake water sample if the unknown lake water sample in the option has been diluted by taking 25.0 mL of lake water and diluting it to the indicated final volume?
Chemistry
The quantity of antimony in an ore can be determined by an oxidation-reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the form Sb3 (aq). The Sb3 (aq) is completely oxidiz...
Math
The grade of a highway up a hill is 50%. How much change in horizontal distance is there if the vertical height of the hill is 175 feet?
Calculus
Evaluate Integral of (lnx)^4/x dx when b is E and a is 1
Math
OMG, thank you!
Calculus
Evaluate integral of x times square root of (2x-1)dx
Calculus
Evaluate integral of x times the square root of (x-4) dx I got u-(8u^(3/2) over 3) Can anyone check this for me?
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