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The concentrationof the alkane C20H42 (FM= 282.55) in a particular sample in rain water is 0.2ppb. assume that the density of the rain water is close to 1.00 g/ml and find the molar concentration of C20H42.
In a solution containing the following dissolved species, which would contribute positively to alkalinity. Explain
Compute the packing efficiency for an fcc lattice, keeping in mind that the close-packing direction is along the body diagonal, yielding a row of atoms along a face diagonal (i.e., the face diagonal = 4r). How does this compare to primitive cubic ..
a student dissolves 1.50g of copperii nitrate in water. after adding aqueous sodium carbonate solution which contains
what is the hybridization of phosphorus in the phosphonium ion (PH4+)
In the presence of large excesses of I^-1 ion, the following set of data is obtained. What is the average rate of disappearance of H2O2(aq) in M/s in the first 45.0 seconds of the reaction if 1.00L of H2O2 reacts at 25C and 1.00atm pressure?
The initial rate of a reaction 2A + 3B -> C + 2D was measured using different initial concentrations of A and B. Calculate the value of k
an ibuprofeninfant suspension has 100 mg 5.0 ml suspension. the suggested dose 10 mgkg body weight. determine how many
A 100.0 mL sample of 0.20 M HF is titrated with 0.10 M KOH. Determine the pH of the solution after the addition of 200.0 mL of KOH. The Ka of HF is 3.5 × 10-4. This is at the equivalence point; so, determine the pH of the resulting salt (KF).
Which state in each of the following pairs has the higher entropy per mole of substance. 1. Ice at - 40 degrees C or ice at 0 degrees C 2. N2 at STP or N2 at 0 degrees C and 10 atm 3. N2 at STP or N2 at 0 degrees C in a volume of 50 L 4.
Calculate the percent enantiomeric excess of the contents of the bottle labeled as just menthol. For the purchased sample what percentage of (-)-menthol is indicated by this measurement?
Cv and Cp denote the molar specific heat capacities of a gas at constant volume and constant pressure, respectively. Then (A) Cp âˆ' Cv is larger for a diatomic ideal gas than for a monoatomic ideal gas.
Carbon is a fascinating element that is capable of forming four covalent bonds.
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