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-BARSIC- [3]
3 years ago
11

How much energy is needed to heat 45 g of water from 15C to 75C?

Chemistry
1 answer:
defon3 years ago
5 0

25.0°C is the exact amount of energy needed to heat 45 g of water, anymore than that can cause the water to start boiling

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naturally occurring bromine molecules, br2 have masses of 158, 160, and 162. they occur in the relative abundances 25.69%, 49.99
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The average atomic mass of an element can be determined by multiplying the individual masses of the isotopes with their respective relative abundances, and adding them. 

Average atomic mass of Br = 158 amu(0.2569) + 160 amu(0.4999) + 162 amu(0.2431)
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