Why Do the Minerals Calcite and Dolomite Bubble with the Mineral

question 33

Multiple Choice

Why do the minerals calcite and dolomite bubble with the mineral or its powder are placed in hydrochloric acid?

• A)Both minerals are sulfides,and the acid reacts to release sulfur dioxide gas.
• B)Both minerals are metal hydrides,and when placed in hydrochloric acid they give off hydrogen gas.
• C)The acid and the mineral together react with oxygen in the air,releasing CO2 gas.
• D)The acid reacts with the mineral to release CO2 gas that is bound into the crystal as carbonate ion.

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Definitions:

Materials Quantity Variance

The difference between the actual quantity of materials used in production and the expected amount, which can impact the cost of goods sold.

Material J

Material J refers to a specific category or type of raw material or input identified with the letter "J" used in manufacturing or production processes.

Direct Materials Quantity Variance

The difference between the budgeted amount of materials needed for production and the actual amount used, valuated at the standard cost.

Labor Rate Variance

The difference between the actual labor costs incurred and the expected or standard labor costs for the production volume achieved.