The idea that the materials in chemical reactions can change form and appearance

Question

The idea that the materials in chemical reactions can change form and appearance, can combine, can combine, vaporize, and turn color but never disappear is best described by the law of multiple proportions. the law of mass conservation. The law of infinite returns. The law of definite proportions. None of the above What is the basis for the two different strategies to naming chemical compounds? Whether the compound is an acid or a base Whether the compound is ionic the covalent How many valence electrons the compound has None of the above The atomic mass of an elements represents The number of protons in its nucleus The number of neutrons in its nucleus The sum of the number of protons and neutrons The sum of the number of protons neutrons and electrons None of the above

Explanation / Answer

7. the idea that the materials in a chemical reaction can chnage form and appearence, can combine, vaporize and turn color but never disappear is best described by,

b. the law of mass conservation

8. Basis for the two different strategies to naming chemical compounds,

d. how many valence electrons the compound has.

9. The number of neutrons in uranium 235 is,

e. none of the above

10. the atomic mass of an element represents,

c. the sum of the number of protons and neutrons

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