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An aqueous solution has 0.0086 g of oxygen dissolved in 2.5 L of water. Calculate the dissolved oxygen concentration of this solution in parts per million.
What mass of solute, in mg is present in a 250 mL sample of potassium chloride solution with a concentration of 7.2 ppm?
Any shipment of peanuts that contains more than 25 ppb of this dangerous fungus is rejected. A company receives 15 t of peanuts to make peanut butter. What is the maximum mass, in grams, of fungus that is allowed?
In many areas, the drinking water standard for nitrate ions is 5.00 ppb. Calculate the mass in yg, of nitrate ions allowed in one glass of 345 mL of tap water
MgNH4PO4 6 H2O loses H2O stepwise as it is heated. Between 40 and 60 C the monohydrate is formed, and above 100 C the anhydrous material is formed. What are the phosphorus percentages of the monohydrate and the anhydrous material?
when 35.6 l of ammonia and40.5 l of oxygen gas at stp burn nitrogen monoxide and water is produced. after the reaction
Question- The galvanic cell described by the balanced chemical equation has a standard emf (electromotive force) of 4.05 V. Calculate the value (J) for the maximum electrical work that the cell can do under standard conditions.
The root mean square velocity of HCl at some temperature was 697.0 m/s. What would be the root mean square velocity of CO2 at this temperature
A sample of nitrogen occupies a volume of 546 mL at STP.What volume would nitrogen occupy at 177C under a pressure of 380 torr?
why KF is a better reagent than LiF for the replacement of chlorine in organic compounds by the autoclave reaction
Compute the mass of solute and water needed to prepare the following solutions: 1. 150 g of 1.00 m (NH4)2SO4: (a) from pure solid (NH4)2SO4 (b) from solid (NH4)2SO4 with a purity of 87.2 wt-% 2. 1.50 L of a 20 wt-% Pb(NO3)2 solution whose density ..
An uncovered cup (1/2 pint) of trichloroethane (d=1.325 g/mL) is kept in an 18-ft3 refrigerator at 39 F. What percentage (by mass) of trichloroethane is left as a liquid when equilibrium is established
Problem- What additional ions can be present in a sodium carbonate solution that has been put in deionized water?
What complementary functional group would need to be present in the neuraminidase active site for (a) hydrogen bonding and (b) ionic interactions to oseltamivir to be observed?
Draw the tetrahedral representation of the S enantiomer of the amino acid alanine, CH3CH(NH2)CO2H.
If the initial concentration of A was 4.75 M, what was the concentration of A (in M) after 180.0 min?
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