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Suppose the half-life is 41.6 s for a first order reaction and the reactant concentration is 0.0429 M 12.8 s after the reaction starts. How many seconds after the start of the reaction does it take for the reactant concentration to decrease to 0.0131 M?
95% wt solution of ethanol in water has density of 0.804gm/mL. Find mass of 1.00L of this solution and the number of grams of ethanol per litre ?
Calculate the heat released when 2.00L of Cl2(g) with a density of 1.88 g/L react with an excess of sodium metal as 25°C and 1 atm to form sodium chloride. [H°f(NaCl) = -411.0 kJ/mol
why would the chemiluminescence be more pronounced than with the flask stoppered? Why is the chemiluminescence even more pronounced with the ferricyanide/hydrogen peroxide mixture?
If 8.6 L of H2 reacted with 4.3L of O2 at STP, what is the volume of the gaseous water collected (assuming that none of it condenses)? 2H2(g) + O2(g) -> 2H2O(g)
suppose you have a solution that might contain any or all of the following cations: Cu2+, Ag+, Ba2+, and Mn2+. the addition of HBr causes a precipitate to form
If a student determined that the circumference of a balloon filled by the boiling point of liquid nitrogen was 45 cm, what volume of nitrogen gas has been generated?
The air we breathe is approximetly 20% oxygen. the reaction for the complete combustion of acetylene is 2C2H2 + 5O2 ------> 4CO2+ 2H2o
the addition of bromine to an equimolar mixture of cis- and trans-2-butene generates only three stereoisomers. Explain.
We are asked to construct an energy level diagram (molecular orbital) for the molecule SO. We are then asked to comment on the ionic species of SO - bond order, bond distance etc. So far so good.
how many moles can be produced from 2.5 moles of Ag2CO3 and final temperature of the calorimeter contents is 23.83°C After dissolution of the salt.
If 18.08 grams of ammonia (NH3) react, how many grams of water should theoretically be produced?
how many moles of N atoms are there in .882 moles of (NH2)2CO?
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