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Hreflang attribute on tag

Recently I discovered that we can add hreflang to our <a> tags to inform about the language of the page which is being linked. It seems to me that it is a perfect fit for links pointing to localized version of a current page. However, the question is whether search engines actually pay attention to […]

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Why does H+ attack alkene first in this reaction?

The reaction is: Why is the double bond attacked here even though it is in conjugation with the lone pairs of O thereby making it harder to extract. Also,don’t the 2 lone pairs on OH have more electron density than the pi bond?

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Apple User Help

Install an older version of MacOS onto an external drive without USB installer?

I want to install Mojave onto an external drive, using a Mac that has Catalina as its current OS. The Mac is old enough to run Mojave. A specific form of this question has been asked before, to which the answer is “create a USB installer disk”. I’m wondering if it might be possible without […]

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A5 Printing on A4 with custom flips and unique layout / flow direction

How do I get the following print layout? I would like to be able to print from anything, be that notes or a website or anything else. My mac has only the following layout settings none of which satisfy my criteria. Do you know a way?

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Ask Chemistry

Why does H+ attack alkene first in this reaction?

The reaction is: Why is the double bond attacked here even though it is in conjugation with the lone pairs of O thereby making it harder to extract. Also,don’t the 2 lone pairs on OH have more electron density than the pi bond?

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Ask Chemistry

Hydrogen Bonding in water

In my textbook, it is given that in a water molecule , oxygen atom can form 2 hydrogen bonds while each of the hydrogen atoms can form only one hydrogen bonds why is it so?

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Why are the retina layers arranged the way they are? [duplicate]

The retina layers are arranged in such a way that light has to pass through several layers before hitting the photosensitive cells. Won’t this be much better if the photosensitive cells made up the first layer? This way there would be no blind spot.

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Apple User Help

A5 Printing on A4 with custom flips and unique layout / flow direction

How do I get the following print layout? I would like to be able to print from anything, be that notes or a website or anything else. My mac has only the following layout settings none of which satisfy my criteria. Do you know a way?

Categories
User Help Web Pro

Free Interactive Charts for publishing proprietary data

Am looking for a free online portal which can render interactive charts which can be embeded on my website. The data to be used for generating the chart will be my own and it will available on a my website in a CSV file, and it will be updated once a day. As soon as […]

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Cyclopentanone is treated with piperidine

cyclopentanone is treated with piperidine in acid catalyzed conditions to form the organic product (A). (A) on reaction with benzyl bromide followed by hydrolysis gives another organic product (B) containing aromatic ring. If the sum of degrees of unsaturation of (A) and (B) is x and the difference of the number of carbon atoms in […]