Dark Silicates Have a Specific Gravity of 3

question 105

Multiple Choice

Dark silicates have a specific gravity of 3.2 to 3.6 and are composed primarily of silica tetrahedral and____________ .

• A) aluminum and sodium
• B) iron and magnesium
• C) aluminum and magnesium
• D) potassium and iron
• E) potassium and calcium

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Definitions:

Informal Contract

A contract that requires no formalities. Also called simple contract.

Formal Contract

A contract that must have a special form or must be created in a specific manner.

Simple Contract

A contract that is not a formal contract. Also called an informal contract.

Third-Party Beneficiary

A third-party beneficiary is a person who, although not a party to the contract, stands to benefit from the contract's execution or has rights that can be enforced under the contract.