Determine the percentage of k2o in a fertilizer
Determine the percentage of K2O (94.20g/mole) in a fertilizer when a 0.4320 g sample gives 0.2138 g ofKB(C6H5)4 (358.2 g/mol). MM K =39.1 g/mole. Sodium tetraphenylborate, NaB(C6H5)4 is used as a precipitant for potassium.
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Cyclist rate was four times faster than walking rate. If time spent on cycling and walking was 5 hours at what rate was cyclist riding?
Determine the balanced equation for the reaction that occurs when the two half-cells are connected? Mn2+(aq) + 2e- ®Mn(s) Eo(red) = -1.18 V v/s SHE
The problem is to calculate Initial hat energy of coldwater using equation m CpT, Cp=4/184J/g-C. Given 20 ml of water it is temperature is 21.00 C when adding 20ml of hot water at 100C it is initial temp is 58.50C
Suppose one begins with 55.0 g of arsenic trioxide dissolved in water, and repeatedly dilutes the solution with pure water, each dilution reducing the amount of arsenic trioxide in the solution by a factor of 100.
The model N=10(4=3t) explains number of deer (N) in the park t years after 40 deer 1.25 are introduced into region. Approximately how long will it take deer population to reach 224?
Determine the ratio of ethyl a mine(CH3CH2NH2) to the ethyl ammonium ion (CH3CH2NH3+) in a solution with a pH of 11.0 pKa forCH3CH2NH3+ =10.636
Determine the numbers of grams of NaCH3COO must be added to 150.0 mL of a .150 M solution of CH3COOH to produce a buffer of pH4.75? Suppose that the volume will remain constant, pK A forCH3COOH = 4.757.
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