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11111nata11111 [884]
3 years ago
14

Which indicator of a chemical change is shown?

Chemistry
2 answers:
Margaret [11]3 years ago
8 0
B.)Formation of a gas
GenaCL600 [577]3 years ago
8 0

Answer: A

Explanation:

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C.

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1. Which of the following components does not make up rock salt? *
horsena [70]

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In my opinion the third one is write.

Explanation:

soil.

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Why is vinegar added to the water when poaching eggs?
inysia [295]
Because when you and the vinegar a chemical reaction happens causing the eggs to poach.
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4 years ago
Can somebody plz help answer this science questions (only 1-2 sentences is good thx !
Mrac [35]
I believe it’s because they are trying to find other things that won’t pollute the environment as much, and they are also doing this because we are trying to reduce green house gas. Sorry if i’m wrong :(
8 0
3 years ago
25. To separate benzene from water, a 850 g aqueous solution of benzene is cooled from
Sonja [21]

Answer:

132.94 kilo joules

Explanation:

We are given;

  • Mass of benzene solution is 850 g
  • Temperature change from 95°C to 3° C = 92° C or 92 K

We are required to determine the energy released by the cooling of benzene.

Taking the specific heat capacity of liquid benzene as 1.7 kJ/kg/K

Then we can determine the amount of heat energy released by using the formula;

Heat = Mass × specific heat × change in temperature

        = 0.85 kg × 1.7 kJ/kg/K × 92 K

        = 132.94 kilo joules

Therefore, the heat released by cooling benzene is 132.94 kilo joules

6 0
3 years ago
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