
MO) LO Be sure to answer all parts. What is the concentration in parts per million...
What is the concentration in parts per million of DDT in 6x10^-4 g in 1.8 kg minnow tissue.
How many milliliters of a 5.7 M NaCl solution would be needed to prepare each solution? a. 55 mL of a 0.38 M solution: mL mL b. 310 mL of a 0.058 M solution: What is the concentration in parts per million of DDT in each of the following a. 0.037 mg in 1200 g plankton ppm DDT b. 2.7 mg in 1.8 kg needlefish tissue ppm DDT
Part B: Parts Per Units Parts per million (ppm) and parts per billion (ppb) are common units for environmen- tal samples. The calculations are very similar to the percentage units. (which are es- sentially parts per hundred units). The mass units must be the same for the numerator and denominator, so these units cancel during the calculations. units; show all Please answer the following questions involving the parts per of your calculations. 7. A sample of river water was analyzed,...
Be sure to answer all parts. Convert each Hz0* concentration to a pH value. a. 2.5 x 10-2 M b. 5.66 x 10-11 M
Be sure to answer all parts. A 1.00−g sample of stream water was found to contain 1.0 × 10−6 g lead. Calculate the concentration of lead in the stream water in units of %(m/m), ppt, and ppm. Which is the most suitable unit? Enter your answers in scientific notation. × 10 % (m/m) × 10 ppt × 10 ppm The most suitable unit is % .
Concentrations of dissolved solids in water are often reported in parts per million (ppm) or parts per billion (ppb). One part per billion of a solute is equivalent to 1 ug (microgram) of that solute dissolved in 1 litre of water (i.e., 1 ppb = 1 pg/L). The toxic water crisis in Flint, Michigan in 2015 yielded test results of up to 1051 ppb of lead dissolved in tapwater. (The maximum allowable concentration set by Health Canada is 5 ppb)....
Be sure to answer all parts. Calculate the concentration of OH ions in a 7.60 x 10-3 M HCl solution. [OH]- *10 M Enter your answer in scientific notation.
Be sure to answer all parts. A 45−kg person drinks 5.0 × 102 g of milk, which has a caloric value of approximately 3.0 kJ/g. If only 17 percent of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? Enter your answer in scientific notation. Hint: The work done in ascending is given by mgh, where m is the mass (in kg), g is the gravitational acceleration...
what is the concentration of a oultion in parts per million if 20.0 g of Na2S is disolved in 40,000 g of solution
Be sure to answer all parts. A volume of 87 mL of 0.080 M NaF is mixed with 29 mL of 0.20 M Sr(NO3)2. Calculate the concentrations of the following ions in the final solution. (Kg for SrF2 = 2.0 x 10-10.) [NO] 0.0070 [Na] [Sr2+] x 0.00074 x