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with the help of two examples, compare the terms basicity and nucleophilicity.
analyse the effects of monosubstituents -OH, -Cl, -NO2 and -CH3 on the benzene ring
property of water that explains why There is a large drop in temperature during evaporation.
The heat needed to vaporize a certain amount of liquid. A certain substance A has a boiling point of 78℃and substance B has a boiling point of 110℃.Answer the following questions and explain your answer in each case.
1.Which substance has a higher vapor pressure?
2.Which substance has a stronger force of attraction?
3.Which substance has a higher heat of vaporization?
4.Which one will have a higher viscosity?
What will be the notation for a Ca ion when two electrons will remove
Butane is a gas that is commonly used for camping stoves and lighters. By mass, it is made up of 82.6% of Carbon and 17.4% of Hydrogen. Look for its empirical formula. If I have 7.85g of Butane in a 1.5 liter tank, with a pressure and temperature reading of 2.5 atmospheres (ATM) and 65.0 oC respectively. What is its molar mass and its molecular formula?
A standard iodine solution was standardized against a 0.4123 g primary standard As2O3, requiring 40 mL of iodine solution. What is the normality of iodine solution? MW of As2O3= 197.84
A simple cubic cell contains one metal atom with a metallic radius of 100 pm:
a. Determine the volume of the atom(s) contained in one unit cell
[the volume of a sphere = (4/3)πr3].
b. What is the length of one edge of the unit cell?
c. Calculate the volume of the unit cell.
d. Determine the packing efficiency for this structure.
e. Use the steps in Problem 11 to calculate the packing efficiency for a bcc unit cell with a
metallic radius of 1.00 Å.
Consider the following reaction:
2 NO + 2 H2 → N2 + 2 H2O
a. The rate law for this reaction is first order in H2 and second order NO. Write the rate law.
b. If the rate constant for this reaction at 1000 Kelvin is 6.0 x 104 M -2 s-1, What is the reaction rate when [NO] = 0.025 M and [H2] = 0.015 M?
The position of a particle along the x-axis depends on the time according to the equation x=mt2-nt3, where x is in meters and t in seconds. Determine what dimensions and units m and n must have?
