(+)- mandelic acid has a specific rotation of 158^(@) What would be the observed specific rotation of a mixture of 25% (-)mandelic acid and 75% (+)- mandlic acid?

(+)- mandelic acid has a specific rotation of 158^(@) What would be th

1.	(+)- mandelic acid has a specific rotation of 158^(@) What would be the observed specific rotation of a mixture of 25% (-)mandelic acid and 75% (+)- mandlic acid?
Answer» `+118.5^(@)` `-118.5^(@)` `-79^(@)` `+79^(@)` SOLUTION :RACEMIC = 50%, `(+)to 50%`