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Chemistry Questions and Answers (Q&A)

Lyophilic and lyophobic are terms which explain the reaction of some solvents with water. There are some solvents which completely dissolve in water and there are still some that do not dissolve in water. Lyophilic is the term used for solvents that love attracting water, when they are mixed with water, they completely dissolve in it. The term is from the words 'Lyo' which means water and 'Philic' which means love.

Lyophobic, on the other hand, is the term used for solvents that do not attract with water by completely dissolve in it. This type of solvents hate dissolving in water, and hence they form insoluble solution. The term is from the words 'Lyo' which means water and phobic which means to hate. Lyophobic solvents do not mix with water because some charges in them are repelling those in water. Mostly, lyophilic solvents are inorganic in nature, while lyophobic solvents are organic in nature.

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In a science equation, a formula is usually used to determine the mass of something. In this case, a formula is used to determine the amount of grams there are in solid barium sulfate if you combined the thirty-five milliliters of 0.160 M of barium chloride with fifty-eight milliliters of .065 M of sodium sulfate.

When these two substances react together, they form of sodium chloride in a liquid form. It would be aqueous. Sodium chloride is a fancy word for table salt. It is represented by the chemical formula NaCl. It has a molar mass of 22.99. If you had one hundred grams of sodium chloride, you would have almost 40 grams of sodium and almost 61 grams of the chloride.

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The aluminum has the greater buoyant force on it.

This is because aluminum has low density than lead. And the density of a substance is defined as mass per unit volume. That means density is inversely proportional to the volume of that substance. Hence, a 10 kg piece of it will have a larger volume and due to this, it will also displace more water. So the buoyant force on the aluminum is larger.

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The correct answer to this question is C. Using A as the standard when B and D are rotated, the shapes and pattern match up with the form of A. When C is turned, it doesn't correlate with the others, which makes it the odd one out. This question would be found on IQ and logic test.

These type of test help evaluate how the tester can think analytically and clearly. Using images, as shown in this question, are one of the most popular ways to test logic. As explained, the odd one out is chosen by selecting the item that is left with nothing in common with the other options.

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The Answer for this one should be A. Saltpeter also known as Knitrate.

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C is the answer to this question. In order to solve this, you need to do some computations. You need to find the ratio of the mass of oxygen and the mass of the compound. You need to multiply this by 100. The given has a mass of 24 then add it to 16. It will become 16/40.

This can still be simplified into lowest terms which will be 2/5. If it would be transformed into decimal, it will be .4. This would be multiplied by 100 like mentioned earlier so the answer will be 40%. You can use the same formula if in case you would come across similar questions.

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The correct answer is option A
Bismuth (Bi) is a metallic element it has the strongest metallic character of all the option listed above. Bi is a poor metal it is similar to the arsenic and antimony. It is the last element in the group which makes it the most metallic; it has the lowest electronegativity and ionization.

All other options are wrong but they are also members of the 15 group. They all follow the same periodic trends, the electronegativity decreases down the group, their ionization energy decreases down the group, the atomic radi increases in size down the group and the melting point, boiling point and metallic point increases down the group.

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Nitrogen 80% Oxegeon 20% that is my answer

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The correct answer to this question is 5. The formula for pH is pH = -log[H+]. pH is used in chemistry, to identify how acidic or basic a solution is. This pH would be acidic because 5 is less than 7. Anytime the value is less than 7, and the pH is acidic. If the value were more than 7, the pH would be basic. Along with chemistry, a pH is also important in fields such as medicine and water treatment. The concent of pH came about in 1909 by Soren Peder Lauritz Sorensen, who was a chemist.

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S. Barnes

Driving down to Knowledge town

Actinides are known to be radioactive elements. Lanthanides are known to be non-radioactive elements, but there are some exceptions. This is not the only difference between the two. Actinides are known to have the ability to form different complexes quickly while lanthanides will not have the ability to do this. Lanthanides tend to have a different chemistry from the other transition metals probably because the 4f orbitals are known to be protected from the other atom’s environment.


The actinides are also known to be more essential as compared to Lanthanides, which may tend to become more neutral. All actinides are known to be paramagnetic while lanthanides may be paramagnetic depending on the unpaired electrons that are available.

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