Aurelia dropped a piece of metal into a beaker, and then she added acid to it. She saw colorless bubbles rising from the metal.
The metal began to turn black. What type of change did Aurelia see?
2 answers:
Answer:
chemical, because a new gas was formed
Explanation:
that was the answer on study island :/
Answer:
Chemical change
Explanation:
From all indicators, Aurelia is seeing a chemical change occurring in the reaction here.
A chemical change is a change in which new substances are produced. For every chemical change:
- they are not easily reversible
- they lead to production of new kinds of substances
- involves mass change
- require considerable amount of energy.
We start off and end with:
Metal + Acid → Black metal + rising gaseous bubbles
Clearly, it is shown that new products are formed and this reaction is impossible to reverse in order to get the reactants back.
This is a typical chemical change.
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A. Fission creates new elements from which electricity can be generated.
Hope this helps!
We know that density = mass /volume
so
mass=volume*density
volume=mass/density
so c is wrong
Answer:
none of the above
Explanation:
Answer:
true
Explanation:
it always an enginering
