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Physical Chemistry
Say what types of intermolecular forces exist in molecules that lower indicated:
a) Cyclohexane (C6H12)
b) chloromethane (CH3Cl)
c) Phosphorus pentachloride (PCl5)
d) magnesium oxide (MgO)
e) sulfur hexachloride (SCl6)
a) Cyclohexane (C6H12)
b) chloromethane (CH3Cl)
c) Phosphorus pentachloride (PCl5)
d) magnesium oxide (MgO)
e) sulfur hexachloride (SCl6)
Physical Chemistry
The vapor pressure of a liquid at 45 ° C is 620mmHg. What is the vapor pressure when the temperature is 60 º C? ( H0vap = 31kJ/mol) (R = 8.314 J / mol K)
Physical Chemistry
Vanadium (V) crystallizes in a body-centered cubic lattice (the vanadium atoms occupy only the points of the network). How V atoms are present in a unit cell?
Physical Chemistry
The metallic iron have a cubic structure. The edge length of the unit cell is 287 pm. The density of the solid is 7.87 g/cm3. Calculate the number of Fe atoms per unit cell
Physical Chemistry
The silver crystallizes in a face-centered cubic structure. The drive-side length is 409 pm. Calculate the density of silver.
Physical Chemistry
A cell centered cubic bases containing 8 X atoms at the vertices of the cell and Y 6 atoms cheeks. What is the empirical formula of the solid?
Physical Chemistry
Find the pH of solution formed by dissolving 0.1 mol of acetic acid (Ka = 1.8 * 10-8) and 0.2 mol of sodium acetate in total volume of 1L.
Physical Chemistry
What are the [H+] and [OH-] in a 0.1moldm^-3 solution of a weak acid (Ka = 1x10^-7)?
a) [H+] = 0.1, [OH-] = 1x10^-13
b) [H+] = 0.001, [OH-] = 1x10^-11
c) [H+] = 0.0001, [OH-] = 1x10^-10
d) [H+] = 1x10^-6, [OH-] = 1x10^-8
The answer is C but I want to know why.
a) [H+] = 0.1, [OH-] = 1x10^-13
b) [H+] = 0.001, [OH-] = 1x10^-11
c) [H+] = 0.0001, [OH-] = 1x10^-10
d) [H+] = 1x10^-6, [OH-] = 1x10^-8
The answer is C but I want to know why.
Physical Chemistry
a 25.0-gram sample of for the the atom with 42 protons whats the percent of oxygen?
Physical Chemistry
In an experiment, hydrogen gas was collected in a cylinder over a bed of water.
a. What other gas was also collected in the cylinder?
b. Assume the pressure was 1 atm at 25C, calculate the pressure of hydrogen gas when the pressure of water vapor was 18.5mmHg at 20C
a. What other gas was also collected in the cylinder?
b. Assume the pressure was 1 atm at 25C, calculate the pressure of hydrogen gas when the pressure of water vapor was 18.5mmHg at 20C
