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The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. ... The only way to use energy is to transform energy from one form to another.
2mm=2,000,000 nm
2,000,000/25=80,000
The answer is 80,000 polio viruses
Supposing complete ionization:
<span>CaCl2 → Ca{2+} + 2 Cl{-} [three ions total] </span>
<span>(1.56 m CaCl2) x (3 mol ions / 1 mol CaCl2) = 4.68 m ions </span>
<span>(1.86 °C/m) x (4.68 m) = 8.70 °C change </span>
<span>0°C - 8.70°C = - 8.70°C</span>
B. is positive
H20 (l)--> H20 (g)
when that happens, the heat is absorbed into the liquid to change the state of the liquid to gas; therefore, in order to change to a gaseous state, heat must be a reactant. and so enthalpy is increasing
