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Problem- How many total moles of ions are released when each of the following samples dissolves completely in water?
(a) 0.15 mol of Na3PO4
(b) 45.4 g of NiBr2•3 H2O
(c) 4.10 X10^22 formula units of FeCl3
Express your answers to three significant figures separated by comma.
Determine the correct formula for this compound; use the "rule of 13" and substitute in O's and N's to generate the possible formulas (ie do not simply use online software to do this problem).
Lead thiocyanate, rm Pb(SCN)_2, has a K_sp value of 2.00 times 10^{-5}.Calculate the molar solubility of lead thiocyanate in 1.00 it M rm KSCN.
The molar mass of compound is measured to be 33.4, 35.2, 34.1, 33.9 g/mol in four trials. What is the avg molar mass & calculate standard deviation and %RSD for determination of the molar mass
Calculate the number of photons required to raise 160.0 g H2O from 38 C to 100 C, its boiling point. Assume the heat capacity of water is constant over this temperature range and is equal to 4.2 J/g-K
Use the systematic treatment of equilibrium to determine the pH and concentrations of species in 1.00 L of solution contatining 0.070 lysine HL 0.055 mol aspartic acid H2A and 0.0080 mol NaOH. Consider just acid base chemistry. Ignore ion pairing ..
This strontium isoptope is radioactive, with a half-life of 28.1 years. Calculate how long (in years) it will take for 5.63g of the isotope to be reduced to .354g by decay
The combustion of one mole of ethanol (C2H5OH(l)) to produce carbon dioxide and gaseous water has ?Hr = -1235 kJ · mol-1 at 298 K. What is the change in internal energy for this reaction?
Describe the similarities and differences between gas-sensing potentiometric electrode and pH membrane potentiometric electrode
What is the dipole moment of HI in C.M 2. The distance between the atoms of H-I is 1.61A . What is the distance in meters. 3. What is the charge associated with each side of the HI molecule 4.What is the percent ionic character of the H-I bond
If an Al strip is placed in CuSo4 solution. Would you expect a spontaneous reaction to take place based on the net potential
A 3.00 L helium balloon, initially at STP, floats up to an altitude of 10 km, where the pressure is 200.0 torr and the temperature is -45°C. What is the balloon's new volume?
A feed mixture weighing 200 kg of unknown composition containing water, acetic acid, and isopropyl ether is contacted in a single stage with 280 kg of a mixture
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