How much heat is needed to change 5.42 grams of solid gold to liquid gold at its melting point of 1,063°c? the latent heat of fusion of gold is 66.6 j/g. a –12.3 joules b 12.3 joules c –361 joules d 361 joules

We can easily calculate for the heat Q needed to change 5.42 grams of solid gold to liquid gold at its melting point using the equation     
     Q = mLf, 
where m is the mass of solid gold and Lf is the latent heat of fusion of gold.

Substituting the values to the equation we now have     
     Q = 5.42 g (66.6 J/g) = 360.972 J

Therefore we need 361 Joules to melt 5.42 grams of solid gold.

Amethod of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.

We have no idea what the graph shows, or why it may be accurate,  because we can't see the graph.on a different subject, choice ' d ' is the only true statement among the choices.