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13.11.2019 •
Chemistry
If you had a beaker full of black powder which of the following could you have?
a. mixture
b. element
c. compound
d. any of these is possible.
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Ответ:
a. mixture
Explanation:
A black powder probably represents a mixture of several dark colored elements, or several elements that reacted and formed a black colored mixture.
Mixture is the union of two or more different substances (regardless of whether they are simple or compound). It has different and variable (non-fixed) physical characteristics (melting point, boiling point, density, toughness, etc.) compared to its constituent substances.
Ответ:
Reaction a: chemical, reaction b: nuclear
Explanation: