For Each of the Following,indicate Whether a Physical or Chemical

question 105

Essay

For each of the following,indicate whether a physical or chemical change occurs.
a.Solid table salt is obtained from evaporation of seawater.
b.Alcohol is boiled off from rum.
c.Mercury vapor is generated by heating mercury(II)oxide.
d.Oxygen is removed from an iron oxide containing Fe₂O₃.
e.Gold metal is separated from river sand by panning.

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Definitions:

U.S. Dollar

The official currency of the United States, widely used as a benchmark in global financial transactions.

Appreciates

Refers to an increase in value or price of an asset, currency, or commodity over time.

Purchasing Power Parity

A theory that states prices of goods and services should equalize across countries when expressed in a common currency, meaning a basket of goods should cost the same regardless of the country after accounting for exchange rates.

Big Mac

a hamburger sold by the international fast-food chain McDonald's, often used as a symbol of globalization and sometimes as a reference point in economic studies like the Big Mac Index.