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A compound decomposes by a first-order process. If 13% of the compound decomposes in 60 minutes, the half-life of the compound is ______ min. SHOW WORK FOR THE QUESTION

The half-life of 131Iodine is 0.220 years. How much of a 500.0 mg sample remains after 24 hours? SHOW WORK FOR THIS QUESTION

What is the pOH of an aqueous solution at 25.0 °C that contains            2.50 × 10-4 M hydronium ion? SHOW WORK FOR THIS QUESTION

The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25 mg sample of cesium 137 to 8.7 mg? SHOW WORK FOR THIS QUESTION

What is the total work done in the process shown. image00855503405.gif

A container contains 1 mole of an ideal gas with Cp = 29.1 J/mol K and Cv = 20.8 J/mol K.  How much heat is required to increase the temperatuer by 500K while keeping the pressure constant?

What is Newton’s 2nd Law of motion?

The diagram shows three processes that raise the temperature of a gas from 100K to 200K, what do all three processes have in common?image00655503405.jpg

An object weighs 30 Newtons and has a volume of .002 m3.  What is its apparent weight while submerged in water?  The density of water is 1000 kg/m3.

In a thermodynamic cycle, which two must be true?