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The standard enthalpy of formation of K+(aq) is -252.14 kJ/mol. How much heat is evolved when 0.1047 g of K(s) reacts with excess HCl?
With respect to VSEPR theory, how does the number of electrons groups on the central atom determine the molecule's shape. How are the bond angles affected by the presence of non-bonding electrons and -bonds
Use Le Chatelier's Principle and the weak acid dissociation equilibrium to explain how the addition of NaOH will completely neutralize an unknown weak acid at the equivalence point in a titration. Consider that hydroxide ion reacts directly with H..
What is the molar concentration of 2.0 grams of sodium chloride brought to 0.25 L using water
How many litersof hydrogen gas will be produced by the decomposition of 90 L of water
lightbulb is visible light and that the average wavelength og the light is 550 nm, how many photons are emitted by the lightbuld each second?
Calculate the weight of potassium chlorate required to prepare 380 mL of wet oxygen collected over water at 20 Celcius and 750 mm of Hg.
What is the ground state electron configuration for the boron atom? What term symbols can arise from this electron configuration?
What are the metric and American engineering units of the diffusion constant?
A gaseous compound containing hydrogen and carbon is decomposed and found to contain 85.63% C and 14.37 H by mass. The mass of 258 mL of the gas, measured at STP is 0.646 g. What is the molecular formula of the compound?
A sample of gas occupies a volume of 364 mL at 1.28 atm and 27 oC. Calculate the volume of the gas if its temperature is changed to 57.0 oC while its pressure is held constant.
Describe 3 types of marine life and how they are affected by the increase of acidity in the oceans.
What mass of water would need to evaporate from your skin in order to dissipate 1.7 × 105 J of heat from your body? H2O(l) → H2O(g) ΔHvap = 40.7 kJ/mol
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