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Federal regulations limit the concentration of Lead in drinking water to 15 ppb. It is discovered that some water had lead levels of 6.4x10^-5 M. what is the concentration of lead in this water sample using units of parts per billion?
Two vessels are labeled A and B. Vessel A contains NH3 gas at 73 degrees C and vessel B contains Ne gas at the same temperature. If the average kinetic energy of NH3 is 7.1 10-21 J/molecule at 70 degrees C.
1) Prions are smaller than viruses, which are affected by radiation. 2) Prions do not contain genetic information, which is affected by ionizing radiation.
Evaluate and contrast the possible results as well as the conclusion that can be drawn from two different experiments involving alpha particles being shot at two different metal foils copper as well as gold both of equal thickness
Utilizing your knowledge of periodic trends, rank the subsequent elements in order of increasing atomic size- N, O, Si State the trends that are governing this property and explain
If the absolute temperature of a gas is doubled, what happens to the root-mean-square speed of the molecules?
Calculate the probability that a quantum mechanical particle in a one-dimensional box will be found in the left quarter of the box through repeated measurements when it is in the lowest-energy state?
what tecnhique is used to separate the active ingredient from each of these compounds citric acid sodium benzoate
Problem- Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.250 M HClO(aq) with 0.250 M KOH(aq). The ionization constant for HClO can be found here.
If the reaction is carried out in a 2.0 L container and 0.010 mol of PH3 is consumed each second, what are the rates of production of P4 and H2?
A vinegar sample contained 4.60% acetic acid . How many mL of 0.450/v sodium hydroxide would be required to titrate 25.00 mL of hte vinegar sample. Assume the density of the sample to be 1.00 g /mL
Does doubling the decibels of a sound intensity level double the intensity? Explain. Why is lightning seen before thunder is heard? Under what circumstances would sound have (a) a Doppler "blueshift" and (b) a Doppler "redshift"?
In which reaction does the oxidation number of hydrogen change?
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