Answer:
C. naturally uncombined with other elements.
Explanation: Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air.
<span>The answer to this question would be: B. a solid that forms when two liquids are mixed
Precipitation is creating a solid substance from the solution. The product is called precipitate and the solution would be called supernate. Precipitation could happen because of gravity pulling up the molecule or because the molecule is saturated.</span>
Not necessarily at all
Having the same volume means that these 2 objects occupy the same amount of space but it does not at all mean that these 2 objects have to be of an equal amount of mass
An example to simplify it is how you can fill a box with 100 little balls but it will require you millions of sand particles to fill the same box
In both cases the volume of the box which the 2 objects occupy is the same but the amount of basic units so to speak is different for sure
This simplification goes further in depth when looking at the atomic infrastructure of matter, objects like those of yours in the question
A Mole of whatever the matter may be, however, has the same amount of mass and this is due to the fact that the Mole is related to the definite <span>Avogadro's number, number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.022140857 × 10</span>²³<span>. </span>
Answer:
Please mention elements so i can answer it
Explanation:
Answer:
No
Explanation:
it will not be a irreversible change because u can give back the pen if it is in its original state and the shop keeper might accept it back that is what mostly happens. if the pen breaks or is used then it might me called a irreversible change until then it is reversible if not used yet.
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