Questions and answers by

Mahnoor

Questions (18)

Solve for x: x – 4(2x – 1) ≥ 2(x – 1)
1. 1 answer
2. 362 views
in todays experiment what length of magnesium ribbon would be required to generate 42.00 ml's of H2?
1. 1 answer
2. 661 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
1. 1 answer
2. 1,203 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
1. 1 answer
2. 1,100 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
1. 1 answer
2. 811 views
estimate Delta H for the following reactionC2H4 (g)+3O2(g)→2 CO2(g)+2 H2O(g) So we have (4) C-H bonds and (1) C=C bond or (H =
1. 1 answer
2. 2,549 views
What is the maximum number of orbitals in an atom that can have the following designations?(a) 5p (b) 2pz (c) n=4
1. 1 answer
2. 672 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,
1. 1 answer
2. 915 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
1. 0 answers
2. 647 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. 0 answers
2. 943 views
While I3- and Br3- are both stable molecules F3- is not a stable molecule. Provide an explanation.
1. 0 answers
2. 866 views
Suppose that 0.205 g of a mixture containing Na2SO4 and K2SO4 is dissolved in water. An excessof BaCl2 is added and a
1. 1 answer
2. 2,394 views
Suppose that 50.0 mL of a 0.250 M HCl solution is mixed with 50.0 mL of a 0.100 MBa(OH)2 solution in a coffee-cup calorimeter.
1. 3 answers
2. 875 views
Consider the following reactionAgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq) DH = -66 kJ Suppose that 100.0 mL of 0.100M
1. 1 answer
2. 3,020 views
Suppose that 1.048 g of benzene is combusted in a bomb calorimeter which contains 945 g ofwater. The temperature of the water
1. 1 answer
2. 1,484 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)
1. 1 answer
2. 870 views
The standard enthalpy of formation of H2O (l) is -285.8 kJ/mol. Calculate ∆E° for the followingreaction. H2O (l) → H2 (g) +
1. 1 answer
2. 1,350 views
The standard enthalpy of formation of H2O (l) is -285.8 kJ/mol. Calculate DEO for the followingreaction. H2O (l) → H2 (g) +
1. 1 answer
2. 723 views