The rate constant for a first-order reaction is 4. 606 x 10^-3 s^-1. The time required to reduce 2.0 g of the reactant to 0.2 g will be:

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#Question id: 27909

#Section 5: Bioprocess Engineering and Process Biotechnology

A 20-1 stirred fermenter containing a Bacillus thuringiensis culture at 30°C is used for production of microbial insecticide, ka is determined using the dynamic method. Air flow is shut off for a few minutes and the dissolved-oxygen level drops; the air supply is then re-connected. When steady state is established, the dissolved-oxygen tension is 78% air saturation. The following results are obtained. Estimate ka.

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#Question id: 3788

#Section 3: Genetics, Cellular and Molecular Biology

The spontaneous loss of amino groups from adenine in DNA results in hypoxanthine, an uncommon base, opposite thymine. What combination of proteins could repair such damage?

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#Question id: 14483

#Section 1: Engineering Mathematics

In a garden 40% of the flowers are roses and the rest are carnations. If 25% of the roses and 10% of the carnations are red, the probability that a red flower selected at random is a rose.

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#Question id: 14853

#Section 1: Engineering Mathematics

If the sum of the mean and the variance of a Binomial distribution for 18 trials is 10, find the distribution

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#Question id: 162

#Section 2: General Biology

All of the amino acids that are found in proteins, except for proline, contain a(n):