Why was the timing of Rudyard Kipling's poem in 1899 significant within the historical context of the period?

Carbon tetrachloride is a toxic liquid. a carbon tetrachloride molecule has one atom of carbon and four atoms of chlorine. what is its chemical formula?

The second westward surge reached the: mississippi river, appalachian mountains, oregon territory

The north american colonies experienced a steady increase in population since the first settlement in jamestown in 1607. by 1775, the colonies' population was around 2,500,000, and most of the colonists lived east of the allegheny mountains. how did geography influence the settlement of america's first colonies?