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Lyrx [107]
2 years ago
14

Is a instant cold pack Endothermic or Exothermic reaction? Explain.

Chemistry
1 answer:
marshall27 [118]2 years ago
3 0

Answer:

Yes an instant cold pack is a perfect example of an endothermic reaction.

Explanation:

They are endothermic because they absorb heat energy from their surroundings. This means that the surroundings of endothermic reactions are colder as a result of the reaction.For example melting ice is a type of this reaction

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7 0
3 years ago
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"if the volume is kept constant, and nothing is added to the reaction mixture, what happens to the partial pressure of nitrogen
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Balance the following equation:
Brut [27]

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3 years ago
How many grams of NaHCO3 are needed to prepare 250 mL of 0.50 M<br> NaHCO3?
forsale [732]

Answer:

10.5g

Explanation:

First, let us calculate the number of mole of NaHCO3 present in the solution. This is illustrated below:

Volume = 250mL = 250/1000 = 0.25L

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Mole =?

Molarity = mole /Volume

Mole = Molarity x Volume

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Now, we shall be converting 0.125 mole of NaHCO3 to grams to obtain the desired result. This can be achieved by doing the following:

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Mass of NaHCO3 =?

Mass = number of mole x molar Mass

Mass of NaHCO3 = 0.125 x 84

Mass of NaHCO3 = 10.5g

Therefore, 10.5g of NaHCO3 is needed.

6 0
2 years ago
What type of igneous rock is cooled and solidified above ground?
valkas [14]
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7 0
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