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Ede4ka [16]
3 years ago
9

Why do metals lose shine but gold does not?

Chemistry
2 answers:
Gennadij [26K]3 years ago
7 0
This is because gold is melted using the outer most part of the candle flame which has complete combustion whereas metals are not burnt in this way and they react with oxygen to produce metal oxides and so the metal as well as silver loses it shine and gets a blackish appearance whereas gold remains shiny throughout because it does not have reaction with oxygen.
morpeh [17]3 years ago
3 0
Because <span>Gold is a very inert metal, and won't really react with oxygen in the air.

The only reason other metals tarnish, such as copper, silver, steel/iron, is

because they're freely reacting with air, to produce a metal oxide surface layer. </span>
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If the actual yielsd of a reaction is 50 g and the theoretical yield is 60 g. What is the percent yield.
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M₁=50 g
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w=100*50/60=83.3%
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Two hydraulic cylinders are connected. If the diameter of one piston is twice the other, the how does the pressure experienced b
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Answer:

They experience the same pressure

Explanation:

To answer this question, we recall Pascal's, Law Pascal's law states that  an increase in pressure at a point in a confined cylinder containing a fluid, there is also an equal increase at all other points in that cylinder.

According to Pascal's law the pressure if the pressure expereienced by the larger diameter piston increases, the pressure experienced by the smaller diameter piston also increases by the same amount

However considering that pressure = Force/area F1/A1 =F2/A2

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we have F1×4/πD² = F2×16/πD² or F1 = 4× F2

They experience the same pressure but the larger cylinder delivers four times the force transmitted from he outside to the smaller cylinder

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nata0808 [166]

Answer:

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Explanation:

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