why do polar compounds dissolve in polar solvents

why do polar compounds dissolve in polar solvents

I would be quite dubious in ascribing much validity to answers which use the word "unpolar", since that word indicates either a lack of familiarity with chemical terminology or a lack of respect for it. The way I consider solvation (for two pure chemical compounds) is that in their pure state the interactions are between molecules of themselves. For two compounds, A B, call them A2A and B2B interactions. These interactions can be either weak or strong (and this can be determined using Thermodynamic experimentation). When considering solubility, the added term is the A2B interactions. When A2A and B2B interactions are weak, then even weak A2B interactions should result in substantial interactions (and hence substantial mixing). When A2A and B2B interactions are both strong, A2B

 why do teens give in to peer pressure

why do teens give in to peer pressure

Peer pressure is the feeling that people get from their friends to conform or behave in a certain way. A person s friends may dress a certain way, comb their hair in a particular style, and have certain ideas about music and movies. Some teenagers may not share these opinions or adopt these fashions, but they may feel that they should. They may be feeling peer pressure and may think that to fit in they would have to adopt similar values, beliefs, and goals or participate in the same activities as their friends. Peer pressure can affect people of all ages. A 4-year-old who begs for a toy because her friends all have it is experiencing peer pressure. An adult who buys a luxury car because others in the neighborhood have luxury cars is responding to peer pressure. Peer pressure,

 why do new tires go on the rear

why do new tires go on the rear

Why Is It Best to Put the New Tires on the Back? The short answer: On a rainy day (or if a sprinkler system is irrigating the pavement), even a small puddle could cause your car to spin out if you have worn tires on the back and new tires on the front. will hydroplane well before new ones. The water in wheel ruts found on older highways can be enough to literally lift the worn tires completely off the pavement. If you have new tires in front and old tires in the back, the worn rears are floating while the deep grooves of the new fronts easily cut through the water. Water is not compressible: It either flows through the tireвs grooves or lifts the rubber from the road. Hereвs why thatвs bad: Rear tires provide stability. If the worn rear tires are riding on top the water, they can t offer

 why do they do a liver biopsy

why do they do a liver biopsy

Laboratory tests will be performed on the day of a liver biopsy or 2-3 days before the procedure, as directed by your doctor. These tests may include a blood count, a, and a measurement of your blood's ability to clot. A doctor will explain the biopsy procedure in detail, including possible complications and answer any questions you may have. You will be asked to wear a hospital gown. You will lie on your back, with your right elbow out to the side and your right hand under your head. It is important that you remain as still as possible during the procedure. An ultrasound may be used to mark the location of your liver. You may receive a small dose of a sedative just prior to the procedure. The doctor cleans and numbs an area on your upper abdomen with a local anesthetic ( -relieving

 why do some objects sink when placed in water

why do some objects sink when placed in water

Whether an object will float or sink in water will depend on its volume and weight. If the weight of the displaced water is more than that of the body, the body will float. On the other hand if the weight is the displaced water is less than that of the body, the body will sink. Again if both of them are equal, the body will partially sink. Sea water contains salt. So its density is more and consequently, the weight of the sea water is more. So there is more chance of a ship to float in sea water than in river water. ADD: It depends on the density of the object. If an object is denser than water, it will sink. If it is less dense than water, it will float. Students are given a plastic tub filled with a variety of materialsвwood of different sizes and shapes, a pencil, a marble, a styrofoam

 why do we see the same face of the moon

why do we see the same face of the moon

If you watch the way the moon spins (or doesnБt), you can see that only the left side has a consistent side facing the surface of our planet (which, we must note, is not even a little bit to scale here). However, the underlying reason why the moon rotates at this exact speed, forcing us to only see a single side of it, is because the moon has been tidally locked to the earth. Tidal locking is a stable configuration, and relatively easy to get to, given enough time, so many of our solar systemБs moons are found to be tidally locked, including the dwarf planet Pluto and its largest moon Charon, which are both tidally locked to each other. The БlockБ part of this name refers to the way that an object - like the Moon - is apparently fixed in position, with one side always facing the other

 why was the civil rights act of 1964 created

why was the civil rights act of 1964 created

Brown v. Board of Education, 1954 Fifty years ago, on July 2, 1964, President Lyndon Johnson signed the Civil Rights Act of 1964, which eliminated discrimination on the basis of race, along with sex, in the workplace. But, this historic bill was not created overnight. Above: Lawyers for the NAACP Legal Defense and Educational Fund Inc. , including Thurgood Marshall, helped end racially segregated schools. According to the US Courts website, the outcome of Brown v. Board declared that segregation in public schools was unconstitutional. Rosa ParksБ Arrest, 1955 Rosa Parks sat in the front of a city bus in Montgomery, Ala. , as a Supreme Court ruling banning segregation on the cityБs public transit vehicles took effect. According to the, Parks was arrested for violating segregation laws.

 why do students do poorly in school

why do students do poorly in school

Typically, the warning signs of failure in school are clear-cut. Your grades are C s or lower, constantly asking for extensions, getting incompletes on assignments, or you simply don t understand anything going on in the class. What s worse is that some people don t realize they re failing until the final grade is posted. Waiting until the last minute to rectify your standing in the class is not a good idea. Be proactive about classwork, and ask for help before the final test. Still not sure where you stand in school. The reasonsPcould bePstaring you in the face, and you haven t picked up on them yet: You have a C or D average: This means you re not mastering the content, but possibly getting by without fulling understanding the material. This is particularly dangerous with an online

 why do we record depreciation in accounting

why do we record depreciation in accounting

To ascertain the net earnings/profit for an accounting period, depreciation need to be computed. Depreciation normally constitutes a major part of the expenses of the business. As the business buys fixed assets, it expects the fixed assets over the useful lives are able to generate the necessary revenues for its business. Whilst revenues being earned and if there is no allocation of depreciation cost to match these revenue, income will then be overstated. Depreciation therefore follows very closely to the matching concept The fixed assets in the Balance Sheet will be overstated if depreciation is not provided for. ...

 why do people want to be a doctor

why do people want to be a doctor

The medical fieldбincorporates the most stringent selection procedures. Why? Because the risks are exceptionally high; in many cases it is a matter of life and death. Be aware that the interviewer leavesб no stone unturned б before selecting the right candidate. The question why you want to be a doctor is frequently asked whether you are preparing for an interview for medical school or for a medical doctor. After reading this article, continue reading the following articles, both of which are located in theб БWhy do you want to become a doctor? Б is a typical question. The primary reason that an interviewer asks this question is to gauge an applicantБs motivational level. Needless to say, no employer will risk selecting an individual who lacks the motivation required. Thus, it is

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