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elena55 [62]
4 years ago
8

Which is the best description of a computer virus?

Chemistry
2 answers:
Alina [70]4 years ago
8 0
Last one that says
~ A biological disease that destroys a computer
wariber [46]4 years ago
7 0

Answer:

A program that can damage a computer

Explanation:

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The free flow of electrons is responsible for
noname [10]

Answer:

An electrical phenomenon is caused by flow of free electrons from one atom to another. The characteristics of current electricity are opposite to those of static electricity. Wires are made up of conductors such as copper or aluminum.

Explanation:

from google

6 0
3 years ago
A 4.5 liter sample of a gas at 2 atm and 300 K has 0.80 mole of gas. If 0.35 mole of the gas is added to the sample at the same
Elis [28]

Answer:

6.5 liters​.

Explanation:

  • We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R  is the general gas constant,

T is the temperature of the gas in K.

  • If P and T are constant, and have different values of n and V:

<em>(V₁n₂) = (V₂n₁)</em>

<em></em>

  • Knowing that:

V₁  = 4.5 L, n₁ = 0.80 mol,

V₂  =  ??? L, n₂ = 0.35 + 0.80 = 1.15 mol.

  • Applying in the above equation

<em>(V₁n₂) = (V₂n₁)</em>

<em></em>

<em>∴ V₂ = (V₁n₂)/n₁ </em>= (4.5 L)(1.15 mol)/(0.8 mol) = <em>6.469 L ≅ 6.5 L.</em>

<em></em>

<em>So, the right choice is: 6.5 liters​.</em>

6 0
4 years ago
A white crystalline salt conducts electricity when it is melted and when it dissolves in water.
sergeinik [125]

Answer: Option (a) is the correct answer.

Explanation:

Ionic salts are defined as the salts which tend to contain ionic bonds as there occurs transfer of electrons between its combining atoms.

So, when an ionic salt melts or it is dissolved in water then it will dissociate into its respective ions and as electricity is the flow of electrons or ions. Hence, this salt is then able to conduct electricity.

As covalent compounds are insoluble in water so, they do no dissociate into ions. Hence, they do not conduct electricity.

Similarly, metallic and network solids do not dissociate into ions either when melted or dissolved in water. Therefore, they also do not conduct electricity.

Thus, we can conclude that when a white crystalline salt conducts electricity when it is melted and when it dissolves in water then this bond is of ionic type.

7 0
3 years ago
Why doctors say to drink water
-BARSIC- [3]
Water is very healthy and beneficial, i some areas you may be told to drink plenty of fluids while sick (common cold) this can replace the fluids you've lost and loosen mucus, together with keeping you hydrated.
 
water is also helps in lubricating bone joints, moisturizing skin, detoxing your body, it can help with headaches , it balances body fluids
5 0
4 years ago
Read 2 more answers
Rosa is planning an investigation using a microscope to try to identify a group of cells. She sees that the cells are joined tog
lara31 [8.8K]

Answer:

either bacterial cells or plant cells but I think bacterial

Explanation:

from google: Bacteria are single celled microbes. Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). ... They can exist as single cells, in pairs, chains or clusters.

- cannot be human or mouse cells as both are animals and animal cells do not have cell walls

6 0
3 years ago
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