Use BODMAS, this is the order in which you must
1. Brackets
2. Divide
3. Multiply
4. Add
5. Subtract
therefore 2x2+2x2-2+2x2=10
N=2p. Blah blah not part of the answer
The answer is <span>20.3896551724</span>
If a total of 780 joules of energy is lost by 25.0 grams of this substance, the heat of fusion is 31.2 J/g
The energy lost, H = 780 Joules
Mass of the substance, m = 25.0 grams
The Energy lost is the product of mass and the heat of fusion
The heat of fusion, c, is calculated using the equation below:
H = mc
Substitute H = 780 Joules and m = 25.0 grams into the equation
H = mc
780 = 25c
Divide both sides by 25

The heat of fusion of the substance is 31.2 J/g
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