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If 200. mL of 0.040 M NaCl with 200. mL of 0.020 M Na2SO4 are mixed and diluted to 500. mL, what is the concentration of sodium ions in the resulting solution?
Suppose that a fully charged lead-acid battery contains 1.50L of 5.00M H2SO4. What will be the concentration of H2SO4 in the battery after 3.40A of current is drawn from the battery for 4.50 hours?
What is the equilibrium concentration of hydronium ion in a solution that is 0.0877 M in HX and 0.240 M in X1- ion?
Describe the biogeochemical cycles for H2O, C and N and describe how human activities have thrown them out of their natural balance.
A sample of gas occupies a volume of 364 mL at 1.28 atm and 27 oC. Calculate the volume of the gas if its temperature is changed to 57.0 oC while its pressure is held constant.
What types of limitations and obstacles must any plausible origin of life scenario overcome, and why did Crick believe life couldn't have formed on Earth?
Some bacteria are able to harvest infrared light of ? ~ 1000 nm. What is the maximum number of 1000 nm photons needed to form one ATP from ADP and Pi
It takes 46.0 to raise the temperature of an 11.2 piece of unknown metal from 13.0 to 25.0. What is the specific heat for the metal?
Chromium is produced by reacting its oxide with aluminum. If 76 grams of Cr2O3 and 27 grams of Al completely react to form 51 grams of Al2O3 how many grams of Cr are formed
If 28.9 grams of trans-2-butene reacts with 14.2 grams of HCl to form 15.5 grams of chlorobutane, what is the percent yield?
if you take a 12.5 mL portion of the stock solution and dilute it to a total volume of 0.600L what will be the concentration of the final solution?
You collected a water sample from your shower containing 3.2mM Ca2+ and 1.1 mM Mg2+ whats the hardness of water in terms of CaCO3/L.
What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.138 M, assuming no change in blood volume?
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