CHEMISTRY MIDDLE SCHOOL

The development of nuclear power has provided electricity for less money, but at a cost. What may be considered a "cost" of nuclear power? A. Large amounts of energy are produced very cheaply.

B.
It takes a lot of energy to run a nuclear power plant.

C.
Nuclear power plants provide new jobs for a community.

D.
The radioactive waste is unsafe and hard to store safely.

Answers

Answer 1
Answer: D. A disadvantage of nuclear power is that waste products are unsafe and hard to store. They must be stored for many hundreds of years before they becomes safe and easier to dispose of, and we currently don't have a good method of storing them in the meantime.


Answer 2
Answer: d. radioactive waste is extremely unsafe and difficult to store safely.

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What three factors affect the formation of magma

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well,if u think of it,they would be time,heat,and pressure.ur welcome!
time ,heat ,pressure and maybe erosion :)

Why are some lava's viscous than other's?

Answers

Viscosity is the resistance to flow (opposite of fluidity). Viscosity depends on primarily on the composition of the magma, and temperature. 

How do you solve for limiting reagent with a balanced chemical equation? What are the steps?

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Balance first the chemical equation given if it's unbalance before moving on to first step of mathematical computation.

How many moles are in 18g of sugar(C6H12O6)

Answers

1 mole of { C }_( 6 ){ H }_( 12 ){ O }_( 6 ) is 180 grams. (Molar mass).

18 is \frac { 1 }{ 10 } of 180 , so it means 18 grams of { C }_( 6 ){ H }_( 12 ){ O }_( 6 ) is \frac { 1 }{ 10 } moles

To find a molecule's molar mass, you should multiply each atom's number with their atomic mass, in the molecule and add them I mean, there are 6 Carbon atoms, 12 Hydrogen atoms and 6 Oxygen atoms. So,

Atomic mass of Carbon is approximately, 12 amu (atomic mass unit), Hydrogen's is approximately, 1 and Oxygen's is approximately, 16. So :

{ C }_( 6 ){ H }_( 12 ){ O }_( 6 )\n \n C\quad \cong \quad 12\quad amu\n H\quad \cong \quad 1\quad amu\n O\quad \cong \quad 16\quad amu\n \n (6\cdot 12)+(12\cdot 1)+(6\cdot 16)\n \n 72+12+96=180\quad amu\n \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \n This\quad is\quad the\quad \n glucose\quad molecule's\n molar\quad mass\n \n

Iron Man died in Infinity Wars, so Mrs. Nogaki has decided that she is going to make her own super hero suit to save the world. She has decided that her suit must have these properties.• It must not be brittle (it must with stand Hulk’s temper without cracking)

• It must have a high melting temperature (so the rockets don’t melt it)

Which kind of bonds should the material Mrs. Nogaki chooses to make her suit from have?

Question 6 options:

Metallic Bonds


Covalent Bonds


Ionic Bonds

Answers

Answer:

Ionic Bonds

Explanation:
Yea it’s Ionic Bonds

Which property is typical of a covalent compound?A. They are extremely hard solids.B. They have low melting and boiling points.C. They conduct electricity.D. They have rigid crystal structures.E. They exist only as gases and liquids.

Answers

Answer:  Option (B) is the correct answer.

Explanation:

A covalent compound is a compound whose atoms are bonded together by sharing of electrons.  

Also it is known that in covalent compounds weak inter molecular forces of attraction exists. Due to which it is easy to break the bond between atoms.

Hence, covalent compounds have low melting and boiling point .

Other properties of covalent compounds are as follows.

  • They are brittle in nature.
  • The do not have a rigid crystal structure.
  • They exist as solids, liquids and gases.
  • Covalent compounds do not conduct electricity.

Thus, we can conclude that out of the given options property that is typical of a covalent compound is that they have low melting and boiling points.

Answer: the correct option is (C).

Explanation:

Covalent compounds have lower melting and boiling points due to presence of weak inter-molecular forces by which molecules are weakly associated to each other. Hence, melting and boiling of covalent compounds occurs at low temperatures.

Usually, Covalents compounds have following properties:

  • They are brittle solids
  • They do not conduct electricity
  • They do not have rigid crystal structure.
  • They exist in all states: solids, liquids and gases.
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