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Which element has greatest hydration energy, sodium ion or potassium ion?
In row Li+, Na+, K+, Rb+, Cs+ hydration energy decrease. This is due to increasing of ionic radius in this row. For sodium ions hydration energy is 406 kJ/mol and...
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Decrease in hydration energy makes a compound __________.
electropositive
electronegative
insoluble
soluble
Decrease in hydration energy makes a compound insoluble.
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Assume 100.00 g of the compound what is the mass of each element in 100.00 g of compound what are the moles of each element in 100.00 g of compound.
Since the identity of the substance in question is not given, I will use a substance such as Sodium carbonate, Na2CO3 to demonstrate how the question can be answered.Using RAM...
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A reddish brown metal is heated in the presence of oxygen forms a black compound. on heating the black compound with hydrogen gas , we get back the metal.what are the metal and compound
Reddish brown metal is copper (Cu). When copper is heated in the presence of oxygen, it forms copper(II) oxide (CuO) - the black compound. Copper (II) oxide can be reduced...
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The molecular formula of a compound used for bleaching hair is h2o2. Calculate (a) mass of this compound that would contain 2.5 moles (b) no.of moles of this compound that would exactly weigh 30g .
a) m(H2O2) = n(H2O2) ∙ M(H2O2) = 2.5 mol ∙ 34 g/mol = 85 g b) n(H2O2) = m(H2O2) / M(H2O2) = 30 g / 34 g/mol = 0.88 mol Answer: a)...
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The empirical formula of a compound is CH. At 200 degrees Celsius, 0.242 of this compound occupies 97.2 mL at a pressure of 0.740 atm. What is the molecular formula of the compound
M=mRT/PV=0.242*8.314*(200+273.15)/(0.74*101.325*0.0972)=130(number of CH)=M/M(CH)=130/(12+1)=10Answer: C10H10.
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which compound will have the larger magnitude enthalpy of hydration
Solution.The enthalpy of hydration is the amount of energy released or absorbed when one mole of an ionic substance is dissolved in water and its ions are surrounded by water...
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Calculate the standard enthalpy of solution of sodium chloride, given that, the lattice energy is -784 KJ/ mol and that the hydration energy is -783 KJ/ mol
ΔHsoln=-ΔHlE+ΔHHydrationΔHsoln=-(-784)+(-783)ΔHsoln=+1kJmol-1
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You added 20g of compound Cin 125 mL water. The MW of the compound C is 285g/mol. What the final molarity of the compound in that 125mL water?
СM = n/Vn = m/Mn = 20/285 = 0.07 g/molCM = 0.07/0.125 = 0.56 mol/L
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An unknown compound contains only C, H, and O. Combustion of 2.90 g of this compound produced 5.79 g of CO2 and 2.37 g of H2O.What is the empirical formula of the unknown compound?
Atomic mass of H=1 g/mole Atomic mass of C=12 g/mole Atomic mass of O=16 g/mole Molar mass of CO2=44 g/mole Molar mass of H2O=18 g/mole Mass of C in 5.79g...
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