CH 124 - 002 General Chemistry (Web-Enhanced) Spring 2025 L.Liban
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Given the following reversible reaction: A(g)2B(g)
At equilibrium, the concentration of A is 0.381
Mand that of B
is 0.154
M. What is the value of the equilibrium constant, Keq?Polyethylene is a synthetic polymer or plastic with many uses. 1.40 g of a polyethylene sample was dissolved in enough benzene to make 100. mL of solution, and the osmotic pressure was found to be 1.86 torr at 25°C. What is the molar mass of the polyethylene? 760 torr = 1 atm
Which of the following represents an exothermic
reaction?
What is the pOH of a solution that has [H3O+] = 6.0 × 10-3 M?
Which type of radiation emitted by radioactive
nuclei is the slowest moving and least penetrating?
What is the complete nuclear symbol for X in the
equation for radioactive decay?
What volume is occupied by 19.6 g of methane (CH4) at 27.0°C and 1.59 atm?
A reaction will be spontaneous at all
temperatures if the reaction
A balloon filled with helium has a volume of 1.00 × 103 L at 20.0°C. What would be the balloon's volume at 30.0°C, if the pressure surrounding the balloon remains constant?
If the hydronium ion concentration of an aqueous solution at 25°C is 5.0 × 10-6 M, what is the hydroxide ion concentration?
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