The symbol for magnesium is Mg, and sulfuric acid is a compound containing sulfur, oxygen, and hydrogen. Its formula is written: H2SO4. So we write Mg plus H2SO4. An arrow shows the direction of ...

After watching Tarkovsky's film "Andrei Rublev" you will write an essay about a symbol used in it. Here is a paragraph about symbols from the Princeton Encyclopedia of Poetry and Poetics by Preminger, ...