(+)-2 - Butanol has `[theta]_(lambda)^(25)=+13.9^(@)` A sample of 2- butanil containing both the enantiomers.The percentage of the (+) and (-) enantiomer in the sample are respectively :

(+)- Butan -2-ol has [alpha]_(D)^(20) =+13.9^(@) .a sample of butane 2-ol contianing both the enantiomers was found to have a specific rotation value of -3.5^(@) under similar conditions. The percentages of the (+) and (-) enantiomers present in the mixture are, respectively,

Dextrororatory alpha- pinene has a specific rotation [alpha]_(D)^(20) =+51.3^(@) . A sample of alpha- pinene containing both the enantiomers was found to have a specific rotation value [alpha]_(D)^(20) =+30.8^(@) . The percentages of the (+) and (-) enantiomers present in the sample are, respectively,

(R)-2-methyl-1-butanol has a specific rotation of " +13.5^(@) ".The specific rotation of "2" - methyl-1-butanol containing "40%" of the (S)- enantiomer is

A sample of impure cuprous oxide contains 66.67% copper, by ,mass. What is the percentage of pure Cu_2 O in the sample? (Cu=63.5)

A sample of zinc oxide contains 80.25% zinc. Calculate the equivalent mass of zinc.

(R)-2-methyl-1-butanol has a specific rotation of +13.5^(@) . The specific rotation of 2-methyl-1-butanol containing 40% of the (S)-enantiomer is _____