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Margaret [11]
2 years ago
13

How are physical and chemical changes similar?

Chemistry
2 answers:
kherson [118]2 years ago
7 0

the answer is A                 lqmndcboerhbfiewrhbc                                

Ivan2 years ago
4 0
I believe A. Neither can change the number of atoms of each element that are present
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How does the law of conservation of mass apply to this reaction C2H4+4O2-->4H2O+2CO2 .Only the oxygen needs to be balanced B.
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C2H4+4O2-->4H2O+2CO2

the answer is C
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3 years ago
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A Calorie unit used in food is equal to the amount of energy necessary to raise the temperature of 1 kilogram of water ________
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A Calorie unit used in food is equal to the amount of energy necessary to raise the temperature of 1 kilogram of water by <u>1</u> degrees Celsius.

<h3>What is One Calorie ?</h3>

The amount of heat energy required to raise the temperature by 1 gram of water through 1°C is known as One Calorie.

1 Calorie = 4.18 J

Thus from the above conclusion we can say that A Calorie unit used in food is equal to the amount of energy necessary to raise the temperature of 1 kilogram of water by <u>1</u> degrees Celsius.

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2 years ago
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Explanation:

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Explanation:

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Write down your own critique about the world is too much with us by William Wordsworth help ​
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