What is your hypothesis (or hypotheses) for this experiment? (this is for the thermal energy transfer)

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

One similarity and one difference between an element and a mixture of elements

Which of the following is described by the equation h2o(s)+ heat=h2o(i) a freezing melting condensing evaporating