When a pure substance undergoes chemical change, the pure substance changes in chemical composition.
Chemical change is any change that involves the formation of new substances or products and it is not easily reversible.
A pure substance is any substance that has a definite chemical composition.
However, when a pure substance undergoes chemical change, the chemical composition of the substance is changed to form new products.
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Answer:
scientists often communicate their research results in three general ways:
1) One is to publish their results in peer-reviewed journals that can be ready by other scientists.
2) Two is to present their results at national and international conferences where other scientists can listen to presentations
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Answer:money
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