EXERCISE 7.2 For each of the following reactions, write the molecular equation, the com-
plete ionic equation, and the net ionic equation.
a. Aqueous sodium sulfide is mixed with aqueous copper(II) nitrate to
produce solid copper(II) sulfide and aqueous sodium nitrate.
b. Aqueous ammonium chloride and aqueous lead(II) nitrate react to
form solid lead(II) chloride and aqueous ammonium nitrate.

answer: the primary difference between a hypothesis and a theory is that b hypothesis is falsifiable, but a theory has been proven to be correct. theory is an explanation of something that is happening but hypothesis is a guess of something that can happen

explanation:

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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