Apply a consistent look across the whole document instead of having to format each section individually. automatically number section headers. apply same font to the entire text body. apply the same font to header sections. use a consistent paragraph spacing. pick a default color scheme for smartart, charts, and shapes. pick from a number of pre-designed styles use them as your own and modify them.
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The answer would be 24mm

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.