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The EPA's secondary standards for contaminants that may cause cosmetic or aesthetic effects in drinking water suggest an upper limit of 0.300 mg/L for iron . If 2.96×104 liters of water in a storage tank contains 26.8 grams of Fe, what is the contaminant level in ppm? in ppb? Is this level acceptable based on EPA guidelines?
_______ppm
_______ ppb
_______ ( acceptable / not acceptable )
the molar heats of combustion of three hydrocarbon gases arech4 methane- 890.0 kjmolc2h6 ethane- 1560.0 kjmolc3h8
Verify the first equality in R (beta(delta e)^2e^Beta(delta e)/[e^Beta(delta e)-1]^2 using the chain rule, and then verify the second equality in the same bolded equation by evaluating the derivative with respect to Beta
A gas sample contains 7.3 g of CH4 and 3.0 g of He. What is the volume of the sample at STP?
What is the molar concentration of OH- in the solution? What is the hydrogen ion concentration in the solution?
Calculate the mass of pure silver that when heated from 12.0 degrees celcius to 15.2 degrees celcius it required 1.25 kj of energy
A restriction enzyme has a recognition seuence between G and C in a palindrome. Show the products of the followling double stranded DNA upon treatment with the enzyme
Gas tank holds 42kg of gasoline. When gasoline burns, 147kg og oxygen are consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxide and water that is produced?
5.0 g of H2O at 23.0 oC is added to 100.0 g of H2O at 67.5 oC. What is the temperature of the resulting mixture
Species A and B were separated using column chromatography. The elution time for species A (tA) was 200 s with a peak width (wA) of 35 s and the elution time for species B (tB) was 321 s with a peak width (wB) of 35 s.
Can someone summarize plate tectonics for me? For example the theory, how it came to be and so on.
an ice cube that is 25.00 g temp -20 c is placed into 225.00 g of h2o that is 22 degrees c. what will the temperature
A helium balloon has a volume of 3.50L at 22.0 degrees celsius and 1.14atm . What is its volume if the temperature is increased to 30.0 degrees celsius and the pressure is increased to 1.20atm
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