CHEMISTRY HIGH SCHOOL

Which compound is an unsaturated hydrocarbon

Answers

Answer 1
Answer: Unsaturated hydrocarbons are those in which each carbon atom is attached to as many hydrogen atoms as it possibly can. There can be no double bonds or non-hydrogen functional groups, since these detract from the maximum possible number of hydrogens that each carbon can be attached to (in the case of double bonds, two carbons are bonded to each other when they could alternately be bonded to one more hydrogen each).All of the alkanes (including the cycloalkanes) are saturated hydrocarbons. Substituted alkanes, alkenes, alkynes, and their cyclic counterparts are all unsaturated.
Answer 2
Answer: triple bonds, Ethene, and benzene ;)

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Which is the best example of technological design

Answers

Well, actually there are many examples. But, the one i know best is the touch mouse by Microsoft.

Which best characterizes a crystal

Answers

A dense substance that is hard and imcompressible.

Answer;

A dense substance that is hard and incompressible

Explanation;

  • Crystals are solids that are made up of particles such as molecules, atoms or ions, which are arrange in a highly ordered microscopic structure, forming a crystal lattice which extends in all directions.
  • Examples of crystals include quartz, that is made up of silicon (iV) oxide molecules that are arranged in a lattice,table salt is another example that is made up of sodium and chloride ions that are arranged in a lattice
  • Crystals are very ordered, they may be made up of atoms of the same elements or atoms of different elements such as in the case of table salt.

The melting points of canola oil, corn oil, sunflower oil, and peanut oil are 10°C, –11°C, –17°C, and –2°C. If you cool a mixture of these oils to 5°C, which one can you separate easily?

Answers

You can separate out the canola oil easily, because it has cooled down enough to turn back into a solid.

Which best describes emerging scientific ideas?

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Answer : Not studied by many scientists.


Explanation : An emerging scientific idea should be something which is not commonly studied by most of the scientists. If it is found to be common with many scientific ideas then it may not be considered as emerging scientific idea. It has to be unique, different and innovative from rest of the ideas.



CH3COOH mc015-1.jpg CH3COO– (aq) + H+(aq) What will happen to the chemical equilibrium of the solution if CH3COONa is added?

Answers

The equilibrium will shift to the left or the backward reaction since addition of CH3COONa will add more CH3COO- ions to the solution. The formation of reactants are promoted.

A real gas behaves least like an ideal gas under the conditions of(1) low temperature and low pressure
(2) low temperature and high pressure
(3) high temperature and low pressure
(4) high temperature and high pressure

Answers

The correct answer is option 3. A real gas behaves least like an ideal gas under the conditions of high temperature and low pressure. At this temperature and pressure, the molecules are close to each other and collisions or interactions are very likely to happen which is not an ideal gas.
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With regard to the pH scale, a solution with a pH A. close to 14 is considered a strong base. B. lower than 7 is considered basic. C. higher than 7 is considered an acid. D. of 6 is considered neutral.
A gas contains a mixture of NH3(g) and N2H4(g), both of which react with O2(g) to form NO2(g) and H2O(g). The gaseous mixture (with an initial mass of 61.00 g) is reacted with 10.00 moles O2, and after the reaction is complete, 4.062 moles O2 remains. Calculate themass percent of N2H4(g) in the original gaseous mixture.
Why CH4 has a lower boiling point than CF4