Determine the PH of a 0

question 155

Multiple Choice

Determine the pH of a 0.188 M NH₃ solution at 25°C.The K_b of NH₃ is 1.76 × 10^-5.

• A) 5.480
• B) 2.740
• C) 8.520
• D) 11.260
• E) 12.656

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Definitions:

Contribution Margin Ratio

The proportion of revenue from each dollar of sales that goes toward covering fixed expenses and creating profit.

Fixed Expenses

Costs that do not fluctuate with changes in production level or sales volume, such as leases and insurance premiums.

Contribution Margin

The amount by which the sale of a product exceeds its variable costs, contributing towards covering fixed costs and generating profit.

Return On Investment (ROI)

A financial metric used to evaluate the efficiency or profitability of an investment, calculated by dividing the benefit (return) of an investment by the cost of the investment.