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A 5.000g of sample that contained BaCl2*2H2O and NaCl was heated. After heating the sample had a weight of 4.751g. Calculate the percent NaCl in the sample?
From the gumarabic showed the elemental analysis of an organic solid extracted that it contained the 6.7%H, 40% C and 53.3% O. Solutions of 0.650g of the solid in 27.8g of the solvent diphenyl provi
With 0≤ x ≤ 2 A particle restricted to one dimension x is described by the un-normalized wave function Ψ (x) = x3. Calculate the probability of finding the particle among the x =
Determine the number of moles of CCl4 formed, One mol of carbon reacted with the 1.00 mol of chlorine: C + 2Cl2 ® CCl4 , suppose the reaction went to the completion.
At room temp when the FTIR spectrum of n-octadecane is collected, there are some sharp peaks due to atmospheric water at >3400 cm^-1. There are also broad CH peaks around the 2900 cm^-1.
An oxygen gas is collected over the water. The total pressure is 738 torr. The temperature of the water is such that the water vapor pressure is 43 torr. Find out the partial pressure of the oxygen
Calculate what observations would be made if the potassium iodide were added to a saturated silver chloride solution. Explain in detail when the Silver iodide is more insoluble than is silver chlor
Determine the molality of the solution if it freezes at-0.9C when an aqueous solution contains the amino acid glycine, NH2CH2COOH. Suppose that the acid does not ionize in the water.
Determine the Henry's Law constant if the solubility of N2 in blood at 37C and at a partial pressure of 0.80atm is 5.6x10^-4 mol/L.
Calculate the screening constants and the effective nuclear charges for: Explain how do these values are relate to each other?
Discuss the trend in the electron affinities and ionization enthalpies across the third short period (Na through Ar). Discuss in detail.
Calculate the boiling points and freezing points of a 1.17m solution of naphthalene in the benzene? Where the freezing point of benzene is 5.5 and the boiling point of benzene is 80.1
Hexane and pentane form an ideal solution. The vapor pressures of pure hexane and pentane are 145 torr and 511 torr, respectively. A solution is prepared by mixing the 1.00 moles of hexane with 2.00
A 0.10mol/l solution of propanoic acid (CH3CH2COOH) is pH 2.96. Determine the percent dissociation and the Ka (Acid dissociation Constant) for this acid.
In the first trial the procedure, The ratio of moles H20/moles CaSO4 is found to be 1,93 and in the second trial the ratio was found to be 1,98. Determine the relative average deviation of the two
Determine the numbers of grams of water were driven off? Determine the numbers of moles of water were driven off? Determine the numbers of percent mass of water in the hydrate?
Why must the crucible be cleaned before weighing at the beginning of the produce? Explain why must the crucible be heated and allowed to cool before the weighing?
Calculate the safety precaution associated with handling the clay triangle, crucible and the tripod? Discuss in deatail.
Determine the numbers of milliliters of this prepared solution are needed to furnish .5000 mol of aluminum nitrate to a reaction.
Before a power outage hit the lab a standard solution was calculated four times on Friday and yielded the following measurements: 4.08, 4.13, 4.03, and 4.07.
Top of Form Based upon hundreds of measurements an often-used method for determining the glucose in serum has a standard deviation of 0.40 mg/dL.
Calculate the 95% confidence interval for this result in ug Fe/mL? The method has a known precision of 1 ug Fe/mL based upon the 40 replicates of a known standard and the measurement of an unknown F
Find out the number of grams to release the enough energy to increase the temperature of 22 ml of water from 15 degrees Celsius to 88 Celsius.
For the combustion of hydrogen H2(g) + 1/2 O2(g) -> H2O(l) the reaction Gibbs free energy is -237 kJ/mol and the reaction enthalpy is -286 kJ/mol.