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From a molecular/ionic point of view (bonds broken/formed), why is it that dissolving potassium nitrate endothermic while dissolving sodium carbonate is exothermic? Do bonds have anything to do with it?
A solution is made by combining 10.0mL of 17.5M acetic acid with 5.50g of sodium acetate and diluting to a total volume of 1.50L
A galvanic cell is constructed with a silver-silver chloride electrode, and a nickel strip immersed in a beaker containing 6.49 x 10-2 M solution of NiCl2.
Define in terms of the electronic structure of an element, chemical activity as it relates to metals, nonmetals, and noble gases. Discuss the change in chemical activity of metals as you go down a group.
If the of a 1.00-. rainfall over 1500 miles^2 is 3.60, how many kilograms of sulfuric acid, , are present, assuming that it is the only acid contributing to the? For sulfuric acid, is very large and is 0.012.
Identify the atom whose electron configuration is [Ar]3d74s2. Write the one or two letter symbol for the element. How many unpaired electrons are there in the ground state of this atom
What is the concentration of an KOH(aq) solution which requieres 25.00mL to titrate 42.30mL of 0.0250M H2SO4(aq) 2KOH(aq) + H2SO4(aq) -> K2SO4(aq) + 2H2O(l)
Why transition elements form interstitial compound
Consider the case of 10 oscillators and eight quanta of energy. Determine the dominant configuration of energy for this system by identifying energy configurations and calculating the corresponding weights. What is the probability of observing the..
Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.50 M B(aq) with 0.50 M HCl(aq)
How much helium gas would it take to ?ll a gas balloon with a volume of 1020 cm 3 when the temperature is 39.0? C and the atmospheric pressure is 724 mm Hg? Answer in units of mol.
3 compounds xyz were found to contain the same empirical formula that is the same number of c ho. however compound x
CaH2(s) + 2H2O(l) Ca(OH)2(aq) + 2H2(g) How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 10.0 L of H2 gas if the pressure of H2 is 769 torr at 28.0°C?
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