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Ostrovityanka [42]
3 years ago
9

!!!Please Hurry:'))!!! The National Severe Storms Laboratory has created a computer program that simulates a thunderstorm. A loc

al research scientist wants to use this simulation to test the theory that several environmental changes affect the behavior of a storm. Why is a controlled experiment NOT feasible for this type of research?
The researcher does not have a hypothesis.


The study has too many uncontrollable variables.


The study requires observation over too long a period of time.


The researcher has no way to collect the data from this experiment.
Chemistry
2 answers:
xxTIMURxx [149]3 years ago
5 0

Answer: the scientist doesn't have a hyposeis

Explanation:as stated earlier the computer has just been made and the scientist wants to try out and TEST to see if it really causes damages this test is hence not controllable as the computer has not been put to use to know enough the damages it does hence the test should not be carried out yet

svetlana [45]3 years ago
3 0

Answer: The study has too many uncontrollable variables.

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Based on your understanding of how bond types influence a material’s properties, identify each of the following compounds as bei
siniylev [52]

Answer: The given compounds are identified as being made of ionic, covalent, or metallic bonds:

  • Steel - Metallic bonds
  • Propane - Covalent bonds
  • Calcium chloride - Ionic bonds
  • Water - Covalent bonds

Explanation:

A bond formed by transfer of electrons from one atom to another is called an ionic bond. An ionic bond is formed between a metal atom and a non-metal atom.

A bond formed by transfer of electrons from one atom to another is called a covalent bond. A covalent bond is formed between two or more non-metal atoms only.

Steel is actually an alloy of carbon and iron where there is less than 2% carbon, 1% manganese and small amounts of silicon, phosphorus, oxygen and sulphur are present.

When atoms of metals are held together then bond formed between these atoms is called metallic bond.

Hence, steel is made of metallic bond.

Chemical formula of propane is CH_{3}CH_{2}CH_{3} as there are only non-metal atoms are present. So, sharing of electrons takes place in such atoms due to which covalent bonding will be there.

Hence, propane is made up of covalent bonds.  

Calcium chloride contains a metal and a non-metal atom. This means that electrons are being transferred from calcium atom to the chlorine atom. Hence, bond present in calcium chloride is ionic bond.

Water has chemical formula H_{2}O. Since, non-metal atoms are present there so sharing of electrons takes place between hydrogen and oxygen atoms. Hence, covalent bond is present in water.

Thus, we can conclude that given compounds are identified as being made of ionic, covalent, or metallic bonds:

  • Steel - Metallic bonds
  • Propane - Covalent bonds
  • Calcium chloride - Ionic bonds
  • Water - Covalent bonds
7 0
3 years ago
Antoine Lavoisier discovered the Law of Conservation of Mass, which states that mass is converted in a chemical reaction. What e
Ilia_Sergeevich [38]
The answer is D. Nothing

T<span>he only thing that must remain equal as stated in the Law of Conservation of Mass are the same number of atoms of each element on each </span><span>side of a chemical equation. </span>
3 0
4 years ago
Read 2 more answers
When an electron in an atom moves from high to low
Trava [24]

Answer:energy is emitted as electromagnetic radiy

Explanation:

8 0
3 years ago
All carbon ato ms have atomic number 6 but some have mass number 12 and others have mass number 14.what is a) the same b) differ
Setler [38]

Answer:

a) The similarities in their structure are;

1) The two isotopes have the same number of protons in their nucleus

2) The two isotopes have the same number of electrons in their orbit

3)The basic chemical properties of the two isotopes are the same

b) The differences in their structure are;

1) The number of neutrons in their nucleus are different

6 for carbon 12 and 8 for carbon 14

2) The structure of carbon 12 is stable while the structure of carbon 14 disintegrates

3) The isotopes have different densities, therefore, different packing

Explanation:

The atomic number is the number of protons in the nucleus of an atom

The mass number is the sum or total number of protons and neutrons in an atom

Given that the atomic number of all carbon atoms = 6

The number of protons in all carbon atoms = 6

Given that some of the carbon atoms have a mass number of 12 while others have a mass number 14, we have

Therefore, the number of neutrons in some of the carbon atoms = 12 - 6 = 6

The number of neutrons  in the remaining of carbon atoms = 14 - 6 =  8

Therefore the carbon atom has two isotopes including ¹²₆C and ¹⁴₆C.

7 0
4 years ago
Which type of electromagnetic waves has more energy, an ultraviolet wave or an infrared wave?How can you tell this by looking at
Nitella [24]
Ultraviolet has more energy. You can tell because it has a shorter wave. The longer the wave is on the electromagnetic spectrum the less energy is stored. 
8 0
3 years ago
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