A Sample of Magnesium Oxide Was Dissolved in 50

question 46

Multiple Choice

A sample of magnesium oxide was dissolved in 50.0 mL of 0.183 M hydrochloric acid,and the excess acid was titrated to a phenolphthalein end-point by 13.4 mL of 0.105 M sodium hydroxide.What was the mass of the magnesium oxide sample?

• A)312 mg
• B)184 mg
• C)156 mg
• D)104 mg
• E)77.8 mg

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Definitions:

Break-even Price

The price level at which the revenues for a product or service equal the costs, resulting in neither profit nor loss.

Markdown

A reduction from the original or previous retail price of a product.

Rate

A measure, quantity, or frequency, typically one measured against another quantity or measure.

Marked Up

Refers to the percentage increase in the price of a good or service over its original cost to achieve a profit.