The air we breathe is approximately 21% oxygen. atypical breath has a volume of 450 ml. how many grams of o2 are in a breath of air

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons