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08.02.2022 •
Chemistry
Jennie decides to mix the content of her beaker with another lab group to see “the results.” Is this safe why or why not explain why.
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Ответ:
no
Explanation:
It could be dangerous since you don't know what substance are you adding.it may end up in an explosion
I hope this helps :)
Ответ:
True
Explanation:
A chemical change is otherwise known as a chemical reaction. A chemical change is characterized by the formation of new substances, evolution of heat and change in chemical composition of substances. The change in the composition of substances during a chemical change is the result of the making and breaking of chemical bonds during a chemical change.
A chemical change is not easily reversible because it involves changes in chemical composition of substances.
An example of a chemical change is the combination of sodium hydroxide and hydrochloric acid according to the reaction equation;
HCl(aq) + NaOH (aq) > NaCl(aq) + H2O (l)
We easily notice the change in the chemical composition of each of the substances involved in the reaction.