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Westkost [7]
3 years ago
15

Which of these is an indication that a chemical reaction has occurred?

Chemistry
2 answers:
Elena L [17]3 years ago
8 0

A change in color indicates a chemical reaction :)

lilavasa [31]3 years ago
5 0

D. a change in color of a substance

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3 0
2 years ago
Rewrite the equation below using the correct conventions for stoichiometric coefficients. 2 BaCl2 + 2 H2SO4 → 2 BaSO4 + 4 HCl
vichka [17]

Answer:

BaCl2+H2SO4 \rightarrow BaSO4+2HCl

Explanation:

The given equation is:

2 BaCl2+2H2SO4 \rightarrow2BaSO4+4HCl

Based on the reaction stoichiometry:

2 moles of barium chloride (BaCl2) reacts with 2 moles of sulfuric acid (H2SO4) to form 2 moles of barium sulfate (BaSO4) and 4 moles of HCl

Although the reaction is balanced, the correct convention is to depict reactions in terms of the lowest molar ratio. Therefore the coefficients (2,2,4 and 4) can be divided by 2 to give:

BaCl2+H2SO4 \rightarrow BaSO4+2HCl

6 0
3 years ago
PLEASE ANSWER FAST!!!!!!!!!!!!!!!
Savatey [412]

Answer:

The answer is A. a wave of vibrating electric and magnetic energy.

6 0
3 years ago
Explain why a Chef in a very busy restaurant would prefer a copper pot over an aluminum pot.
marissa [1.9K]

Answer:I dont know the answer but i need the points thx!!!!

Explanation:

6 0
3 years ago
Read 2 more answers
Other than through sexual reproduction, how can variations in genetic material occur in a population?
melomori [17]

Answer:

Through their adaptations from their habitat; environment

Explanation:

Charles Darwin explains evolution and their genetic material evolves during the process. For example, fruit birds have narrow bills whilst seed-eating birds have big bills. The foods they eat forced their DNA to adapt with the system in order to survive.

5 0
3 years ago
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