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Andrej [43]
2 years ago
8

Express in scientific notation. Choose the answer with the proper number of significant figures.

Chemistry
1 answer:
mojhsa [17]2 years ago
4 0
A&B YOU CAN SAY 69000000000=6.9x10^10&69x10^10
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Calculate the energy required to heat of ethanol from to . Assume the specific heat capacity of ethanol under these conditions i
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17 kJ

Explanation:

Calculation for the Calculate the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C.

Using this formula

q = mC∆T

Where,

q represent Energy

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C represent Specific heat capacity=2.44J·g−1K−1.

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Let plug in the formula

q=(0.60 kg x 1000 g/kg)(2.44 J/gº)(13.7°C-2.2°C)

q = (600g)(2.44 J/gº)(11.5º)

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Therefore the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C will be 17 kJ

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