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Determine the quantity of unknown protein that has an absorbance of 0.227 when a blank has an absorbance of 0.081. The previously determined calibration curve has the form of a straight line with the equation A = 0.0182 × m 0.007, where A is the corrected absorbance and m is quantity of protein in units of ?g.
What is the freezing point (°C) of a solution prepared by dissolving 11.3 g ofCa(NO3)2 (formula weight= 164 g/mol) in 115 g of water? Assume that i=3.00 for Ca(NO3)2 and the molal freezing point depression constant for water is1.86°C/m.
The molar heat capacity of a compound with the formula C2H6SO is 88.0 J/mol-K. what is the specific heat of this substance.
iF 0.80g of a gas occupies 295 mL at 25 degrees Celcius and 680 mm Hg of pressure, what is the molar mass of the gas.
Hydrogen phosphate buffer, Buffer solutions have the unique ability to resist changes in PH when an acid or base is added to them. One important buffer system that helps to maintain blood pH at a constant value of 7.4 is the hydrogen phosphate buf..
If 32.5 grams of CaO are dissolved in 212 grams of water, what is the concentration of the solution in percent by mass?
When steam (hot water) is passed over iron, hydrogen gas and iron (3) oxide are formed. What weight of steam would be needed to react completely with 100.0g of iron.
Calculate molarity of solution obtained by dissolving 0.212g of Na2CO3 in 250cm3 of solution?
determine How many grams of Phosphine (PH3) can produce if 37.5 grams of P4(phosphorus) and 83.0 Litres of H 2 gas react at STP?
Calculate the number of moles of hydrogen gas that can be produced by the reaction of excess water with 8.75 x 1021 atoms of barium.
A copper refinery produces a copper ingot weighing 180lb . If the copper is drawn into wire whose diameter is 8.10 mm , how many feet of copper can be obtained from the ingot? The density of copper is 8.94g/cm3 .
Define Ideal gas law, Calculate the free energy of mixing when 1 mole of liquid A is mixed with 4 moles of liquid B at 25 degrees C to form an ideal solution. What is the change in chemical potential of component A?
2C4H10 + 13O2 → 8CO2 + 10H2O The equation shows the combustion of butane (C4H10). How many moles of water can be produced by 12.5 moles of C4H10 with excess oxygen?
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