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Lead is a toxic metal that affects the central nervous system. A Pb contaminated water sample contains 0.0012 % Pb by mass. Q) How much of the water (in mL) contains 160mg of P}? (Assume a density of 1.0 mg/mL)
Calculate the wavelength of each of the following frequencies of electromagnetic radiation. 1105 kHz (typical frequency for AM radio broadcasting) (assume four significant figures)
If the balloon rises to an altitude at which the temperature is -2.8°C and the pressure is 0.068 atm, what will the volume of the balloon be?
To determine the freezing points of distilled water, 1m glucose, 1m NaCl, 1m CaCl2. Use the freezing point of the pure water as a baseline to determine deltaTf for each of the solutions
Find the equilibrium constant for the reaction- A(g) + B(g)--> 2C(g) at 25C when k equals 1.4 x 10^-12 M^-1S^-1 for the reaction A(g) + B(g)-->2C(g) at 25C and k equals 2.7 x 10^-13 M^-1S^-1 for the reaction: 2C(g)-->A(g) + B(g) at 25C.
if a 2.6 reaction vessel initially contains 725 of cyclopropane at 485 how long will it take for the partial pressure
Calculate the frequency of the light emitted when an electron in a hydrogen atom makes each of the following transitions.
Calculate the moles and the mass of solute in 250.0 mL of 6.00 M NaOH.
Calculate the grams of potassium hydrogen phthalate required to react with approximately 25 mL of 0.1 M NaOH
The solution filtered , then we took 25 mL of this unknown acid for titration. we use NaOH base for titration ,the volum of titrated base when it reach the equivalence point was 3.2 mL . and the concentration of NaOH is 0.1 M.
a tank contains helium at 490 mmHg, nitrogen gas at 0.750 atm, and neon at 520 torr. what is the total pressure in atm?
how many grams of aspiring were lost in the washing process you used to purify the product, assuming you used 50 mL of water for washing? The solubility of aspiring in water is 0.33 grams per 100 mL at room temperature?
List a balanced chemical equation for each of these chemical reaction types and explain how it is used
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