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Ede4ka [16]
2 years ago
14

If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes it is called a

Chemistry
1 answer:
vladimir1956 [14]2 years ago
3 0

Answer:

Physical change

Explanation:

Physical change -

It is the type of reversible change , where there is change in the state of the matter , is referred to as a physical change .

There is no chemical process involved during state change , i.e. , no new substance is formed .

Hence , from the given statement of the question, the correct term is physical change.

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In which compound does the bond between the atoms have the least ionic character? 1. hf 2. hcl 3. hbr 4. hi?
Ymorist [56]
<span>HI because the degree of iconic character can be determined based on differences in electronegativity which for HI is .5. Also, Hydrogen Iodide is made up of Hydrogen Halide and a Diatomic Molecule, both of which are non-metals. HF is 1.9, HCL is .9, and HBR is .7; hence HI being the correct answer.</span>
7 0
3 years ago
Read 2 more answers
Pasteur's study of fermentation was critical to the development of microbiology because A. fermentation chemistry occurs in the
earnstyle [38]

Answer:

B. It showed that microorganisms bring about chemical changes

Explanation:

In 1857 Pasteur was working to solve a problem with the distillers of Lille in wich in their barrels the alcoholic fermentation become in a  lactic fermentation, and of course, that was something that they didn't want. Throughout diferents studyes Pasteur discover that different microorganism where involved directly (where responsible) in different types of fermentation. That was the key to start the microbiology studies worldwide.

7 0
3 years ago
According to this Bohr model, in what period would this element be found?
Tasya [4]

Answer:

yes

Explanation:

yes

4 0
2 years ago
Calculate the number of molecules of NO2 in 0.25 mol of NO2 . Please show your work to receive credit.
patriot [66]

Answer:

4.25

Explanation:

2+0.25+2

4 0
3 years ago
Classify the chemical reaction: 2A1 + 3NiSO4 → Al2(SO4)3 + 3Ni
TiliK225 [7]

Answer:

Following are the types of chemical reactions with a brief overview:

1) Combination (Two elements combine to form a compound)

2) Decomposition (A compound is broken into elements)

3) Single displacement (An element displaces an element present in a compound)

4) Double displacement (The elements of two compounds displace each other)

5) Combustion (Burning Takes places)

6) Redox (Oxidation Reduction Reaction)

If you see the given equation, Al is displacing Ni in the compound NiSO4 and taking its place. Ni is set free as a separate element. So this type of reaction is known as Single Displacement Reaction.

6 0
3 years ago
Read 2 more answers
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