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Mahnoor
Questions and answers by
Mahnoor
Questions (18)
The standard enthalpy of formation of H2O (l) is -285.8 kJ/mol. Calculate DEO for the following
reaction. H2O (l) → H2 (g) +
2 answers
659 views
The standard enthalpy of formation of H2O (l) is -285.8 kJ/mol. Calculate ∆E° for the following
reaction. H2O (l) → H2 (g) +
3 answers
1,250 views
In order to calibrate a bomb calorimeter , 3000 g of water is added to the calorimeter. next,
1.08 x 10-2mol of ethanol (C2H6O)
2 answers
781 views
Suppose that 1.048 g of benzene is combusted in a bomb calorimeter which contains 945 g of
water. The temperature of the water
3 answers
1,411 views
Consider the following reaction
AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq) DH = -66 kJ Suppose that 100.0 mL of 0.100M
3 answers
2,919 views
Suppose that 50.0 mL of a 0.250 M HCl solution is mixed with 50.0 mL of a 0.100 M
Ba(OH)2 solution in a coffee-cup calorimeter.
4 answers
784 views
Suppose that 0.205 g of a mixture containing Na2SO4 and K2SO4 is dissolved in water. An excess
of BaCl2 is added and a
3 answers
2,291 views
While I3- and Br3- are both stable molecules F3- is not a stable molecule. Provide an explanation.
1 answer
806 views
Consider the Li2+ ion.
(a) Calculate the wavelength of light emitted when the electron jumps from the n=4 level to the n=2 level.
1 answer
868 views
The ionization energy of Fe is 434 kJ/mol. What is the maximum wavelength of light capable of ionizing Fe? What type of light is
3 answers
574 views
Give the maximum number of electrons in an atom that can have the following set of quantum numbers.
(a) n=4 (b) n = 5, ml = 1,
2 answers
857 views
What is the maximum number of orbitals in an atom that can have the following designations?
(a) 5p (b) 2pz (c) n=4
2 answers
612 views
estimate Delta H for the following reaction
C2H4 (g)+3O2(g)→2 CO2(g)+2 H2O(g) So we have (4) C-H bonds and (1) C=C bond or (H =
3 answers
2,485 views
Find inverse of f if f(x)= x^2-4x+3, (for x is smaller than and equal to 2).
First prove that f(x) is one to one in the defined
3 answers
724 views
The rate constant for the decomposition of gaseous azomethane,
C2 H6 N2 (g) > N2 (g) + C2 H6 (g) Is 40.8 min-1 at 425OC. Find the
2 answers
1,027 views
A 1.0 x 10-2 M solution of a weak acid is found to be 3.7% dissociated. Calculate Ka of this acid.
I found the amount dissociated
2 answers
1,129 views
in todays experiment what length of magnesium ribbon would be required to generate 42.00 ml's of H2?
2 answers
623 views
Solve for x: x – 4(2x – 1) ≥ 2(x – 1)
1 answer
307 views
Answers (4)
Agyee ka solution nai hay na upper walay question may
This is wrong
I'm explaining for HI03 First we assign oxidation numbers to Oxygen and Hydrogen then to any other atom. So oxygen is -2*3 and H is +1. So now let I's oxidation number be x. +1+x+(3*-2)=0 (0 because the overall compound has 0 charge) +1+x-6=0 x-5=0 x=5
You mean 9.6*10^7/1.5*10^-2? If yes the answer is 6.4*10^9
