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beks73 [17]
3 years ago
8

Please I really need help with this

Chemistry
2 answers:
sesenic [268]3 years ago
5 0

Answer:

B. It is used to open and close the circuit.

Ksju [112]3 years ago
3 0

Answer:

B. it is used to open and close the circuit

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pH of 1 is Red

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Indicators are substances which change color to signal the end of an acid-base reaction as required by the balanced chemical equation of the reaction.

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Indicator brainly.com/question/9290459

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