[mass]

According to my notes the formula to calculate a DBE is = (c+1) - (H* - N)/2

I applied this forumla in order to calculate the number of double bond equivalents for the molecle C6H1206.

So = 6+1 - (12)/2

However, according to the textbook the answer is meant to be 1 but the answer I get using the formula is different.

[Arkcon]

According to my notes the formula to calculate a DBE is = (c+1) - (H* - N)/2

I applied this forumla in order to calculate the number of double bond equivalents for the molecle C6H1206.

So = 6+1 - (12)/2

However, according to the textbook the answer is meant to be 1 but the answer I get using the formula is different.

Ummm...the result of your formula above is, in fact, 1.  What do you get?

[mass]

how can it be 7-12 = -5 and then divided by 2 = -2.5.

[sjb]

Instead of ^(6+1-12) / ₂, look at the formula again. It should be 6+1 - ¹²/₂ = 1.

Remember division and multiplication have higher priority than addition and subraction.

(This is one of those times I wish I spoke LaTex better)

S

[mass]

Instead of ^(6+1-12) / ₂, look at the formula again. It should be 6+1 - ¹²/₂ = 1.

Remember division and multiplication have higher priority than addition and subraction.

(This is one of those times I wish I spoke LaTex better)

S

oh yes, simple rules of maths. Thanks again sjb, you are a star.