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A radioactive sample contains 2.50 of an isotope with a half-life of 3.8 days.How much of the isotope in grams will remain after 14.2 days?
Calculate the mass percent of a solution that is prepared by adding 32.2 g of NaOH to 262 g of H2O.
meteorological balloon contains 375 L of helium at 29°C and 0.928 atm. If the volume of the balloon can vary according to external conditions, what volume would it occupy at an altitude at which the temperature is -40°C and the pressure is 0.031 a..
Draw electron-flow arrows on the structure on the left to indicate how the electrons reorganize to give the structure. Please Draw all steps and add charges where needed.
Note that in some cases, the "product" may be the result of a proton transfer reaction. Do not assume that an aqueous workup (H3O+) is performed unless it is specified
Therefore, a more systematic manner of indicating stereochemistry in these systems has been developed that uses the E and Z nomenclature system.
Imagine that a beaker of pure water and another beaker containing water and some NaCl are both boiling under 1 atm pressure. Which of the following statements do you think is correct for this case
What is the freezing point of a solution of 224 g of ethylene glycol (C2H6O2) dissolved in 1000 g of water?
A gas mixtue of Ne and Ar has a toal pressure of 4.00 atm and contains 16.0 mol of gas. If the partial pressure of Ne is 2.75 atm, how many moles of Ar are in the mixture
what is green chemistry. how does it relate to heating A mixture of sodium carbonate and sodium bicarbonate (lab)
Find a formula for the curvature of the function P= nrt/v-nb - (an^2)/(v^2) ,where n, R, a, b,and T are treated as constants.
What is the approximate value of the equilibrium constant, Kn, for the neutralization of hydrochloric acid with sodium hydroxide, shown in the equation below
If the 53 g aluminum block is initially at 25^circ C, what is the final temperature of the block after the evaporation of the 1.02 galcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and t..
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