Answer: -
Zero
Explanation: -
Double bond equivalent or level of unsaturation is the number of unsaturation present in a organic molecule. The term unsaturation may refer to a double bond or a ring system.
The double bond equivalent for an organic compound can be found out by the help of the formula
DBE = C+1 -0.5 H - 0.5 X + 0.5 N
The chemical formula of the compound B = C₇H₁₆O
So there are 7 carbons, 16 hydrogens and 1 oxygen. There is no halogen or nitrogen.
Plugging into the formula,
DBE = 7 + 1 - 0.5 x 16
= 0
Thus there is no unsaturation or double bond present in the compound B with the molecular formula C₇H₁₆O
B. 6.45 mol F2
The mole ratio here is 3 mol F2 for every 1 mol S. Multiply 2.15 mol S by 3 to get the mol of F2 needed.
Chromosomes abnormalities often happen due to one or more of these:
Errors during of sex cells (meiosis)
Errors during of other cells(mitosis)
Substances that causes birth defects (teratogens)
The statement that is true about magnets is ''Similar poles of a magnet repel each other.''
<h3>What are the characteristics of magnet?</h3>
All magnets have both north and south poles. Opposite poles attract each other, whereas the similar poles repel each other. When you rub a piece of iron along a magnet, this force creates a magnetic field.
So we can conclude that The statement that is true about magnets is ''Similar poles of a magnet repel each other.''
Learn more about magnet here: brainly.com/question/14997726
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