Answer:
D. Fire
Explanation:
Fire represents that if any acid or chemical reaction occurs, there may be chances of fire/explosion occurring. Wind, sunlight and dust doesn't matter when it comes to experimenting with chemicals.
Hope it helped! Mark BRAINLIEST!
D. ) After heating, it would be all of the above....
A beaker of black powder can be a mixture with different substances (i.e gunpowder: a mixture of sulfur, charcoal, etc.), an element which can probably be carbon (known as black), and a compound as well which can be potassium nitrate. Hence, the answer is D.
They can change properties completely
They can be separated
They form a new set of elements and compounds
<span>The elements become part of the original compounds</span>
For the answer to the question above, asking to w<span>rite the complete balanced equation for the reaction between aluminum metal (Al) and oxygen gas (O2)and You do not need to make the subscripts smaller.
My answer would be,
</span><span>4Al(s) + 3O2(g) --->2 Al2O3(s)
</span>
I hope this helps.
