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Andrew [12]
3 years ago
14

What is the mass of a sample of water that increases the temperature of the water from 10 ºc to 15 ºc and absorbs 1200 j of heat

?
Chemistry
1 answer:
Reika [66]3 years ago
4 0
Q=mc(delta T)
m= Q/ c(delta T)
m= 1200 J / (4.19 J/kg C) (15-10)
m= 57. 28 kg
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Lets do process of elimination!

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C. Burning gasoline - When gas burns it usually combines with oxygen to give carbon dioxide, water etc.  It is a chemical change.

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3 years ago
4. How many moles of KBr are found in 3 Liters of 0.4 M solution?
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There are 1.2 moles of KBr found in 3 Liters of 0.4 M solution.

<h3>HOW TO CALCULATE NUMBER OF MOLES?</h3>

The number of moles of a substance can be calculated by multiplying the molarity by the volume.

No. of moles = Molarity × volume

According to this question, 3L of a KBr solution are contained in a 0.4M.

no. of moles = 3L × 0.4M = 1.2moles

Therefore, there are 1.2 moles of KBr found in 3 Liters of 0.4 M solution.

Learn more about no. of moles at: brainly.com/question/14919968

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