Rafters are usually on 2 ft. centers.
Yes, it does.
12' is max for a 2 x 4 wall. You will need 69 studs for a 90' wall with 16" centers.
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home improvement centers have floor scrapers they will rent to you. they are a heavy machine with two wheels and a vibrating blade in front that you walk behind, great for pulling up tile, carpet, linoleum, etc. . .
No, nifedipine does not have any chiral centers. It is a racemic mixture of two enantiomers, meaning it does not have stereoisomers that are non-superimposable mirror images of each other.
An amino acid can have a maximum of two chiral centers, but they do not all have two chiral centers. For example, threonine and isoleucine are amino acids that have two chiral centers.
Sucrose does not have any chiral centers because it is composed of two monosaccharides, glucose, and fructose, which are both not chiral in the specific form found in sucrose.
Betamethasone has three chiral centers.
Streptomycin has four chiral centers.
24-heptadiene has two chiral centers. Chiral centers are carbons that have four different substituents attached, leading to non-superimposable mirror image structures.
For chiral compounds, the number of possible isomers depends on the number of chiral centers in the molecule. The maximum number of stereoisomers that can be formed for a molecule with n chiral centers is 2^n.
For a molecule with n chiral centers, there are a possible 2^n isomers that can be formed.
Enalapril contains one chiral center.
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Morphine contains four chiral centers.
Glucose is chiral, as it has several chiral centers, including the carbon atom bonded to the hydroxyl group in the penultimate carbon of the chain.