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A 29.2 g mixture of the compounds magnesium oxide (MgO) and calcium sulfide (CaS) is 82.1% by mass calcium sulfide . The compound calcium sulfide is 55.6% by mass calcium. Calculate the mass (g) of calcium in the mixture.
in the blood plasma, pH is maintained by the carbonic acid-bicarbonate buffer system. a)how is pH maintained when acid is added to the buffer system? b)how is pH maintained when base is added to the buffer system
identify the incorrect names or formulas.calciumii oxidehintaluminum
Calculate the molar concentration of ferrocyanide in a solution of 0.031 M ZnSO4 saturated with Zn2Fe(CN)6. ZnSO4 will be completely dissociated into Zn2+ and SO42-
at room temperature more of the collisions have sufficient energy to produce a reaction. the piece of zinc needs to be bigger at 4 deg c.
1. consider the sn2 reaction of butyl bromide with oh- ion.ch3ch2ch2ch2br oh- ? ch3ch2ch2ch2oh br-assuming no other
Calculate the theoretical pH of the solution when beginning with 10.00 mL of 0.200 M HCl and dilute it to 50.00 mL with distilled water.
Carbon tetrachloride may react with oxygen to produce chlorine and carbonyl chloride.2CCl4(g) + O2(g) 2COCl2(g) + 2Cl2(g); Kc = 9.9 × 1051What is Kc for the following equilibrium?COCl2(g) + Cl2(g) CCl4(g) + ½O2(g)
The vapor pressure of water at 40.0 degrees celcius is 55.32 mmHg. Calculate the vapor pressure of a solution of 1.50m K2CO3 at this temperature (assume 100% dissociation)
In an excess amount of oxygen, how many grams of CO2 (g) are theoretically produced from the combustion of 901.0 g of glucose [C6H12O6 (s), molar mass of 180.2 g/mol]?
30.0 mL of water at 24.5 °C was mixed with 40.0 mL of water at 40.0 °C. If the specific heat of water is 4.184 J/g °C and no heat was absorbed by the calorimeter, then the final temperature is _____ °C. (Report to the proper number of significant ..
How many moles of NaOH per liter of water are needed for this pH adjustment. (pK1=6.3 and pK2=10.3). How many moles of lime (Ca(OH)2) would be required
Name the enzymes and describe their mechanisms of action that help reshuffle disulfide bonds or catalyze the cis-trans peptide prolyl isomerization
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