CHEMISTRY MIDDLE SCHOOL

HOW DO MATTER, ELEMENT, ATOM,CRYSTAL, COMPOUND, and MOLECULE, RELATE?

Answers

Answer 1
Answer: They're all intertwined! For instance: Matter is composed of Atoms - which are kept together and create molecules.  Elements are made up of only one kind of atoms.  Atoms that have different elements and are bonded together form compounds. If atoms are ever aligned in a perfect 3d arrangement, they form an awesome crystal.

So in short: They all are one big happy family, so to speak that are either the outcome or help decide the outcome of the product.
Answer 2
Answer: Atoms make up everything around us including us and they also make up matter. Elements are Earth, Wind, Fire and Water.

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The reaction between zinc and hydrogen chloride produces zinc chloride, hydrogen gas, and heat. If more heat is removed from the reaction, how does the rate of reaction change to counter the action?

Answers

Answer:

The rate of reaction increases to counter the action of removing heat.

Explanation:

  • The reaction between zinc and hydrogen chloride produces zinc chloride, hydrogen gas, and heat.
  • The reaction is exothermic reaction. Heat is produced in the reaction.
  • It means the temperature of system increase when reaction proceeds. When heat is removed from system, it stimulates the reaction to fast to produce more heat.
  • Due to fast reaction rate of reaction increases.

Which of the following describe hybrid atomic orbitals? check all that apply a mixture of all atomic orbitals in an atom a mixture of the valence orbitals in an atom There are as many hybrid orbitals as there are electrons in an atom. There are as many hybrid orbitals as there are valence electrons in an atom. There are as many hybrid orbitals as there are valence orbitals that mix together. have a different shape and a different energy than the atomic orbitals of which they are made have the same shape but a different energy than the atomic orbitals of which they are made

Answers

The hybrid atomic orbitals are formed by the combination of the valence orbitals on an atom. The hybrid orbitals formed have different energy and shape compared to the atomic orbitals that combine to form the hybrid orbitals. Hybrid orbitals help in explaining the shapes of the molecules and other bonding properties.

Therefore the correct answer will be,

b. A mixture of the valence orbitals in an atom

e. There are as many hybrid orbitals as there are valence orbitals that mix together.

f. Hybrid orbitals have a different shape and different energy than the atomic orbitals of which they are made

How does your body respond differently the second time it is exposed to a pathogen than the first time it was exposed to the same pathogen?

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after your first exposure to a pathogen, you have memory T cells that will remember the antigen of the pathogen son in the future if you would come in contact with the same pathogen your body will recognize it right away and be able to kill it much faster

How many moles of oxygen are required to react completely with 16.5 mol Al?

Answers

Answer:

12.4 mol O2

Explanation:

                                4Al +       3O2 -----> 2Al2O3

from reaction          4 mol        3 mol

given                    16.5 mol       x mol

x = 16.5*3/4 =12.4 mol    O2

How long is a red blood cell

Answers

I suspect this question should read "How long does a red blood cell live." A red blood cell lives for between 100 and 120 days. It takes 7 days for a new red blood cell to develop from stem cells. Stem cells are similar to base cells. They can also be seen as a general template from which specialized cells are made. Stem cells can be taken from a newborn baby's umbilical chord or extracted from an adult blood donor's blood.This 

What is a harmful effect of electrical resistance?

Answers

While voltage does pose a threat, it's mostly the current that causes damage. There must be voltage available to motivate electrons to flow through a victim. Resistance to current causes (in the case of the victim being human or having flesh) burnt tissues, muscles freezes, and fibrillates hearts.

Answer:

Resistance resist the flow of current. This means that if 5V go through a resistance, it'll be reduce down to something below or equal to 5V.

If it gets reduce below 5V, lets say it goes down to 3V, the extra 2V must go somewhere. That 2V energy is converted to heat and dissipated through the resistor.

If there's a big current then the energy dissipated will be huge. And more negery = more heat which can cause fire and burn you.
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