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Determine the "exact" alkalinity of water (in mg/L asCaCO3 ) that have the 0.6580 mg/L of bicarbonate, as the ion, at a pH of 5.66?
When performing a chemical analysis then why the separation of mixtures into pure or relatively pure substances so important?
A saturated solution of manganese (II) hydroxide is one in which the following equilibrium occurs: Mn(OH)2(s) ? Mn 2+(aq) + 2OH-(aq) Kc = 1.6 E-13. Find out the pH of this saturat
A 1 m3 sample of air was found to contain 80 micro grams per m3 of sulfur dioxide. The temperature was 25oC and the pressures were 103.193 k Pa when the air sample was in use. Determine th
According to the First-order kinetics the concentration of a chemical degrades in water and the degradation constant is 0.2/day. If the initial concentration is 100 mg/L, Determine the number of da
A flask contains 49.8 mL of 0.150 M calcium hydroxide. Determine the number of millimeters of 0.350 M sodium carbonate is needed to react totally with the calcium hydroxide?
A chemist wants to arrange 0.25 M HCl. Commercial HCl is 12.4 M. Determine the number of millimeters of the commercial acid does the chemist need to make up 1.50 L of the dilute acid?
Determine the minimum voltage needed for the electrolysis of 1.0M NaCl in neutral solution. 2H2O + Cl- (1.0M)---> H2(1atm) + Cl2(1atm) +2OH- (1 x 10-7M)
Reflect on an electrochemical cell which is constructed from the following half cells, linked by a KCl salt bridge and by an external circuit.
In the composite ion [ML6]n+, Mn+ has seven d electrons and L is a strong field legend. Here the magnetic properties of the composite ion correspond that determine the number of unpaired electrons
Determine the de Broglie wavelength of a baseball of mass 0.17kg which is thrown with a velocity of 30 m/s.(me(mass of electron)= 9.1093819E-11)
The freezing point of t-butanol is 25.50°C and Kf is 9.1°C·kg/mol. Usually t-butanol absorbs water on exposure to air. If the freezing point of a 30.0 g sample of&nb
Describe the composition of a methanol (CH3OH)-propanol (CH3CH2CH2OH) solution which is having a vapor pressure of 188 torr at 40°C? At 40°C, here the vapor pressures of pure methanol is 303
A bottle of wine having the 14.5% ethanol by volume and where the density of ethanol (C2H5OH) is 0.789 g/cm3. Determine the concentration of ethanol I in wine in terms of mass molality and percent.
The 3.33 gram sample of iron ore is distorted to a solution of iron (II) sulfate and this solution is titrated with the 0.150 M potassium dichromate.
At the developing process of film of black and white film, the silver bromide is removed from the photographic film by the help of fixer. The major component of the fixer is sodium thiosulfate.
The magnesium is used in the airplane bodies and the other type of lightweight alloys. Thus the metal is obtained from the seawater in a procedure that involves the neutralization, precipitation, el
Suppose you have to make a pH 3.50 buffer and also you have 0.10 M solution of HCOOH and the 0.10 M HCOONa, Determine the number of milliliters of each solution would you use to prepare a liter of
If 0.86 mole of MnO2 and 48.2 g of HCl react, which reactant will be used up first? Determine the number of grams of Cl2 will be formed?
In one experiment 0.886 mole of NO is mixed with 0.503 mole ofO2. Conclude which of the two reactants is the limiting reactant. Determine also the number of moles of NO2 formed.
Which is starting with the 3.60 moles of CO, compute the number of moles of CO2 formed if there is enough oxygen gas to react with the entire CO?
The % composition of cytosine is 29.74 % C, 5.82 % H, 26.41 % O, 11.56 % N, and 26.47 % S. Determine the molecular formula if its molar mass is apron. 121 g?
The Paradichloro-benzene having only the C, H, and Cl and has a molar mass of about 147 g. Here it is Given that combustion of 1.68 g of this compound creates 3.02 g CO2 and 0.412 g H2O, conclu
Conclude the empirical formula of an organic compound which is containing only C and H given that combustion of a 1.50 g sample of compound produces 4.71 g CO2and 1.93 g H2O
The Lactic acid consists of C, H, and O, has long been thought to be responsible for muscle soreness following strenuous exercise. Calculate the empirical formula of lactic acid given that the comb