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Part A
What is the mass of iron(III) oxide that contains 58.7 g of iron? Iron(III) oxide contains 69.64% iron by mass?
Part B
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide:
CaO(s)+H2O->Ca(OH)2(s)
A 3.50-g sample of CaO is reacted with 3.38 g of H2O Which is the limiting reagent? How many grams of the limiting reagent remain after completion of reaction?
A 0.00 B 0.00694 C 2.25 D 1.04 E 0.125
The pKa of one of the hydrogens that is attached to one of the nitrogens of the purine guanine is 9.7. If guanine is in a solution that has a pH of 10.2, then what fraction of the guanine molecules would be in the protonated form at this pH?
Adipic acid with melting point 151c is added to succinc acid of 185 c what is the effective in melting point
Calculate the pre-equilibrium concentration of Fe3+(aq) in a solution made by mixing 2.8 mL of 2.010?3 M Fe(NO3)3 and 7.2 mL of 2.010?3 M NaSCN. Assume the final volume is 10.0 mL.
suppose 2.3754g of copper(II) sulfate pentahydrate is heated to drive off the water of crystallization. Calculate what weight of anhydrous salt will remain?
The vapor pressure of a solution containing 53.6 g glycerin (C3H8O3) in 133.7 g ethanol (C2H5OH) is 113 torr at 40 degrees Celsius.
If Kp = 1.80 for this reaction, what is the total pressure inside the vessel at equilibrium?
by solving this problemnbsp student understand about isotopic abundance and how to calculate atomic weight average
Calculate the pH of a solution containing 25.00 mL of 0.12 M formic acid (Ka = 1.7 x 10^-4) to which the following amounts of 0.10 M NaOH have been added:
Use values of Ksp and Kf for copper (II) hydroxide and its complex to predict if a precipitate should form in a 0.1 M Cu2+ solution that is 3 M OH-. Ksp Cu(OH)2 = 1.3*10^-20 and Kf Cu(OH)42- = 1.3*10^16
How do the spacings of the energy levels of X and H compare, where X has one electron like the H atom but has different energy levels and for X: E = - (RH / n3) and RH is the same as H (2.179 ×10?18J)?
a sample consisting of 2.0 mol co2 occupies a fixed volume of 15.0l at 300k. when it is supplied with 2.35 kj of energy
Calculate the standard enthalpy of formation of gaseous carbon dioxide (CO2) using the following thermochemical information: 2 C(s) + H2(g) C2H2(g) H = +226.8 kJ 2 C2H2(g) + 5 O2(g) 4 CO2(g) + 2 H2O(l) H = -2599.3 kJ 2 H2O(l) 2 H2(g) + O2(g) H = +..
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