CHEMISTRY HIGH SCHOOL

compared to the melting points of ionic compounds, the melting point of molecular solids tend to be...

Answers

Answer 1
Answer:

Explanation:

Ionic compounds are the compounds formed by transfer of electrons between its atoms. Atoms of ionic compounds have opposite charge and that is why these atoms are held together by strong forces of attraction.

As a result, melting point of ionic compounds is high.

Whereas molecular solids are attached by weak Vander waal forces, that is, melting point of molecular solids is low.

Thus, we can conclude that compared to the melting points of ionic compounds, the melting point of molecular solids tend to be low.

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A substance has a triple point at -24.5 ∘C and 225 mmHg. What is most likely to happen to a solid sample of the substance as it is warmed from -35 ∘C to 0 ∘C at a pressure of 220 mmHg? A substance has a triple point at -24.5 and 225 . What is most likely to happen to a solid sample of the substance as it is warmed from -35 to 0 at a pressure of 220 ? The solid will melt into a liquid, The solid will sublime into a gas, or Nothing (the solid will remain as a solid).

Answers

Answer:

The solid will sublime into a gas

Explanation:

See the phase diagram attached (the diagram is not an exact representation of this case, it is only illustrative). You starts at point A, that is, a point below triple point pressure (220 mmHg is lower than 225 mmHg) and to the left of triple point temperature (-35 °C is lower than -24.5 °C). Then, you move to point B, which is at the same pressure at A but its temperature is to the right of triple point temperature (0°C is greater than -24.5 °C).
this product remains as mercury if it is subatomic

When wood is burned, energy is released in the forms of heat and light. Describe the reaction, and explain why this change does not violate the law of conservation of energy. Use the terms combustion, exothermic, and chemical energy.

Answers

Burning wood would be a sort of combustion (spontaneous), which is a biochemical process that occurs involving chemical energies.

  • It's indeed exothermic, which means it generates heat because it happens. Whenever the hardwood is burnt, charcoal decomposes and then becomes responsible for the formation and creates a new particle.
  • Because the carbons aren't generated but just redistributed or shuffled, this doesn't contradict the principle or the concept of conserving energy.

Thus the above approach is appropriate.

Learn more about combustion here:

brainly.com/question/2121609
Burning wood is a form of spontaneous combustion, a type of chemical reaction occurring with chemical energy. It is exothermic, meaning it releases heat when it occurs.When wood is burned, carbon breaks down (which creates the crackling sound you hear) and creates a new material. Since the carbons are not being created and only rearranged, this does not violate the law of conservation of energy.

Van der Waals forces can best be describes as attrctive or repulsive forces that are formed

Answers

Van der Waals forces can best be describes as attractive or repulsive forces that are formed after bonding. The type of bonding will help us determine what will be the phase of the compound. Just like in liquids, attractive forces are caused by van der Waals bonds.

A sulfur atom has 16 protons and 16 electrons. If you add a proton to a sulfur atom, what have you done? Created an isotope of sulfur. Created a positively charged ion of sulfur. Created a negatively charged ion of sulfur. Converted the atom into a different element.

Answers

The addition of a proton to the sulfur atom has resulted in the formation of an isotope. Thus, option A is correct.

The addition of a proton to the nucleus has been resulted in the change in the atomic mass of the element without changing the atomic number.

The atomic mass has been the number of protons and neutrons present in the nucleus. The ions have been resulted when there has been a change in the number of electrons in the atom.

The isotopes have been the element that has been considered of the same atomic number with different atomic masses.  The addition of a proton to the sulfur atom changes its atomic mass and thereby forms the isotope of sulfur. Thus, option A is correct.

For more information about the protons and electrons, refer to the link:

brainly.com/question/803445

Answer:

Created a positively charged ion of Sulfur

Explanation:

As the number of protons in Sulfur is more than the electrons in Sulfur, thus it'll be a positively charged ion of Sulfur

Which of the following explains why hot liquids have a greater average energy of motion than cold liquids? *Hot liquids have more electrons
Cold liquids have more electrons.
Particles in hot liquids move faster than particles in cold liquids
Particles in cold liquids move faster than particles in hot liquids.

Answers

Particles in hot liquids move faster than particles in cold liquids. The faster a particle moves, the greater its kinetic energy.

The number of electrons in a particle has nothing to do with its kinetic energy.

Particles in cold liquids move more slowly than particles in hot liquids.

How is the periodic table constructed ?

Answers

Before the periodic table, there were a bunch of symbols, number, letters etc (In all kinds of languages) that represented the elements. Scientists around the world saw that a chart of the elements needed to be universally accepted and finalized. A guy named Mendeleev presented this idea to the scientific community. Mendeleev was also the first to order elements according to atomic number rather than atomic weight. The modern day periodic table was not published by him, it was developed with the help of the entire scientific community. Honestly, there isn't a specific way to tell you how the periodic table was constructed, scientists developed thousands of tables that represented the elements. And just to let you know, the modern day periodic table is constantly going through changes as we discover more and more about elements, atoms, molecules etc. so in the near future it wouldn't be surprising if we saw something completely different than what we see today.
The Periodic Table is in order of electrons, and the columns are set up to show the amount of electrons in the outer most orbit.
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