Chemistry, 14.11.2019 22:31 felipe9086

What does it mean when a mineral has a definite chemical composition? select 2 choices.
it always occurs in pure gorm.
it always contains certain elements.
it cannot form from living or once living materials.
it always contains elements in definite proportions.
it cannot contain atoms from more than one element.

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What does it mean when a mineral has a definite chemical composition? select 2 choices.
it al...