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VARVARA [1.3K]
3 years ago
6

As long as a substance ________, it is considered a physical change.

Chemistry
1 answer:
-BARSIC- [3]3 years ago
7 0

Answer:

as long as a substance becomes a new substance it will be considered a physical change

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Draw structural formulas for the alkoxide ion and the alkyl(aryl)bromide that may be used in a williamson synthesis of the ether
Juliette [100K]
Williamson synthesis is the most common way for obtaining ethers, called after its developer Alexander Williamson. It is an organic reaction of forming ethers from an organohalide and an alkoxide. The reaction is carried out according to the SN2 mechanism.

On the attached picture it is shown required alkoxide ion, <span>alkyl(aryl)bromide and the ether that forms from the reactants. </span>

3 0
3 years ago
If 25.0 g NO are produced, how many grams of nitrogen gas are used?
mr Goodwill [35]

Using the stoichiometry of the reaction and the information provided in the question, the mass of N2 used is 11.62 g.

<h3>Chemical reaction</h3>

The term chemical reaction refers to the combiantion of two or substances to yiled one or more products. The reaction equation in this case is N2 + O2 --->2NO.

Now;

Number of moles of NO = 25g/30 g/mol = 0.83 moles

1 mole of N2 yields 2 moles of NO

x moles of N2 yileds 0.83 moles of NO

x = 0.415 moles

Mass of N2 = 0.415 moles * 28 g/mol = 11.62 g

Learn more about stoichiometry:

brainly.com/question/12166462

8 0
2 years ago
Which one does not share the same properties as the other
myrzilka [38]

Answer:

Ti

Explanation:

Ti is titanium and does not share any similar properties with the likes of Si, silicon and At, astatine.

  • Titanium is a transition metal and a solid.
  • Silicon and Astatine are non - metals.
  • Silicon and Astatine also belongs to the p-block on the periodic table whereas Titanium is found on the d-block.
  • Silicon and Astatine would prefer to take part in reactions where they can gain electrons because they are non metals whereas Titanium due to its metallic property would prefer a reaction where it can lose electrons.

5 0
2 years ago
The symbol for iron is Fe. The chemical symbol for oxygen is O. The formula for iron oxide, a type of rust is Fe2O3. How many ir
borishaifa [10]
The answer is B 2 Hope it helps
5 0
3 years ago
Study the diagram of a cell.
My name is Ann [436]
The answer would be W and Z
5 0
3 years ago
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