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Sliva [168]
3 years ago
5

A change in color indicates that what has occurred?

Chemistry
1 answer:
Alex3 years ago
6 0

Answer:

it's an indicator that a chemical reaction occurred.

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In a piece of metal, what holds the atoms together?
Aleks [24]

Answer:

c

Explanation:

the positive charges of the nuclear and the negative charges of delocalized electrons

8 0
3 years ago
Read 2 more answers
why are the theoretical density values of brass, bronze, and steel reported as a range of densities? how can you categorize thes
Julli [10]

<u>Answer:</u>

<em>Theoretical density values  </em>

  • brass- 8.4-8.73 gm/cm^3
  • bronze- 8.73 g/cm^3
  • steel- 7.75 - 8.05 gm/cm^3

<u>Explanation:</u>

All of these substances are<em> </em>alloys (a substance made from melting two or more substances, one of them usually being a metal). Brass is a combination of copper and zinc, bronze is mostly copper, tin and other non-metals as well and steel is majorly made up of iron and copper. These alloys have various uses and varying importance in different kinds of industries.

6 0
3 years ago
Explain The element lithium has two common isotopes: Li–6 and Li–7 If the average atomic mass of lithium is 6.94004 u, determine
rosijanka [135]

Answer:

%Li-6 = 5.996% & %Li-7 = 94.004%

Explanation:

let X₁ = Li-6 & X₂ = Li-7 where Xₙ = mole fraction

X₁ + X₂ = 1 => X₁ = 1 - X₂

6·X₁ + 7·X₂ = 6.94004

=> 6(1 - X₂) + 7·X₂ = 6.94004

=> 6 - 6·X₂ + 7·X₂ = 6.94004

=> 6 + X₂ = 6.94004

X₂ = 6.94004 - 6 = 0.94004 => %X₂ = %Li-7 = 94.004%

X₁ = 1.00000 - 0.94004 = 0.05996 => %X₁ = %Li-6 = 5.996%

6 0
3 years ago
Which statement is NOT true about Texas during the 1920s?<br><br><br> Its C
Hatshy [7]
The answer is c because you said it was c lol
5 0
3 years ago
What property of the mixture of gelatin in water tells you that the mixture is not a solution
Svetllana [295]
<span>Read the Fig 4 description. From there you can conclude that it does scatter light, because its ot a solution. So it must be a mixture, the substances are not dissolved so therfore they aren't a solution.</span>
8 0
4 years ago
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