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What is balanced molecular equation, the spectator ions, and the net ionic equation for:
NaCl and Ba(NO3)2
the hydrogen atom relaxes to a lower energy level, emitting light of 397 nm. What is the value of n for the level to which the electron relaxed.
Consider the following data. 2 Ca(s) + O2(g) 2 CaO(s) H = -1270.2 kJ C(s) + O2(g) CO2(g) H = -393.5 kJ CaO(s) + CO2(g) CaCO3(s) H = -178.3 kJ Use Hess's law to calculate H for the reaction below.
A sample of helium gas has a volume of 8.23 L at 258.8 K and 2.049 atm. How many helium molecules does it contain
The total volume of seawater is 1.5 1021 L. Assume that seawater contains 3.1 percent sodium chloride by mass and that its density is 1.03 g/mL. Calculate the total mass of sodium chloride in kilograms and in tons. (1 ton = 2000 lb; 1 lb = 453.6 g..
Explain how you might do this same titration if you did not have a pH meter. Why do you think that the sample titration curve of acetic acid titrated with NaOH would look different than a titration curve for the tirtration of phosphoric acid with ..
A pipe 10 cm in diameter contains steam at 200?. It is covered with an insulating material that is 5 cm thick. This insulating material has a constant of thermal conductivity K = 0.00060 cal/cm2 sec. The outside surface of the system is 35?. Find ..
the solubility of the ionic compound m2x3 having a molar mass of 238 gmol is 2.89 10-7 gl. calculate the ksp of the
Explain what volume (in mL) of a 0.2587 M NaOH solution do you require to completely neutralize 25.00mL of a 0.1500 M H2SO4 solution? H2SO4(aq) + 2NaOH(aq) ? 2H2O(l) + Na2SO4(aq)
Show that, after as much gas as possible has leaked out during time interval t, the change in internal energy isΔU = εIt - P0(nv0 - V),
To make 5 L of a .2 M aqueous solution of glucose, how many grams of glucose (C6H12O6) do you need. The atomic masses are carbon 12, hydrogen 1, and oxygen 16.
Use tabulated half-cell potentials to calculate Delta G(rxn) for each of the following reactions at 25 degrees Celsius. MnO2(s)+4H(aq)+Cu(s)--->Mn2+(aq)+2H2O(l)+Cu2+(aq)
However the dimmers are termed SDS-resistant for the reason that they do not further dissociate into monomers in the presence of the detergent. Explain what intermolecular forces might be acting at the dimmer-dimmer interface? Explain Are the inte..
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