At 20 ° C the Henry's Law Constant for N₂O

question 9

Multiple Choice

At 20 ° C the Henry's law constant for N₂O is 2.72×10 ^{- 2} molal/atm. How many grams of N₂O (molar mass = 44.0 g/mol) will dissolve in 180 g of water (molar mass = 18.0 g/mol) at 20 ° C if the pressure of N₂O above the solution is 1.5 atm?

• A) 0.13 g
• B) 0.022 g
• C) 0.32 g
• D) 1.8×10 ^{- 2} g
• E) 4.1×10 ^{- 2} g

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Definitions:

Double-Declining-Balance

The Double-Declining-Balance method is an accelerated depreciation technique which doubles the rate of straight-line depreciation, emphasizing higher depreciation costs in the early years of an asset's life.

Residual Value

The projected sale price of an asset at the termination of its operational life.

Depreciation Expense

Apportioning the expense of a concrete asset across its serviceable life.

Useful Life

The estimated period over which an asset is expected to be usable by the owner.