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Suppose you analyze a sample of fertilizer by the procedure of this experiment and obtain 1.000g of MgNH4PO4 * 6H20. Calculate the equivalent mass of P2O5 initially in the sample. I do not understand what the equivalent mass is.
I take 250.0 mL of 0.250 M sugar and mix it with 500.0 mL of 0.100 M NaCl. What is the concentration of sugar in the mixture. What is the concentration of NaCl in the mixture
One of the most common causes of inaccurate melting points is too rapid heating of the melting point bath. Under these circumstance
The freezing point depression of water is a rather small 1.86 deg C kg/mol. Addition of 0.454g of zinc chloride to 3.33g of water lowers the melting point by 5.2 deg C. Calculate the expected melting point for this mixture and account for any diff..
a sample of oxygen that occupies 2.5 times 10-6 ml at 508 mm hg is subjected to a pressure of 1.2 atm. what will the
A NiMH battery containing 4.10 g of NiO(OH)was 50% discharged when it was connected to a charger with an output of 1.30 A at 1.3V.
When no single electronic formula can be drawn for a stable molecule so as to maintain the octet rule and still fit the observed properties
The reaction for the decomposition of dinitrogen monoxide gas to form an oxygen radical is: N2O--->N2 + O2. If the activation energy is 250 kj/mol and the frequency factor is 8.0 x 10^11 s^-1, what is the rate constant for the first order reaction..
A 45.8 mL sample of a 5.8 M KNO3 solution is diluted to 1.00 L. What volume of the diluted solutions contains 15.0 g of potassium nitrate
A solution containing 3.47mM X (analyte) and 1.72 mM S (standard) gave peak areas of 3473 and 10222, respectively, in a chromatographic analysis. Then 1.00ml of 8.47mM S was added to 5.00ml of unknown X, and the mixture was diluted to 10.0ml. This..
Most transduction systems for hormones and sensory stimuli that involve trimeric G proteins have in common all of the following except
curved arrows to symbolize the flow of electrons, white the stepwise mechanism for the acid-catalyzed esterification of p-aminobenzoic acid to ethyl p-aminobenzoate
determine what volume of hydrogen h2 gas measured at the pressure and temperature 758mm hg and 88 degrees c
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