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SCORPION-xisa [38]
3 years ago
15

What are the 3 most valuable metals in the United States? A. Lead b. Gold c. Iron d.Copper e.Coal f.Silver g.Titanium

Chemistry
1 answer:
shepuryov [24]3 years ago
5 0

Answer:

Gold, Silver and Titanium

Explanation:

The most valuable metals in the list are:

Gold:

Its value makes it a good investment option. Gold can be used in many different ways, like in jewelry, electronics, medicine, etc.

Silver:

Similar to the case of gold, besides the common value of silver in jewelry, it can be also used in other ways, because it has a large thermal and electrical conductivity.

Finally, the titanium: It's price is actually close to the copper one, but for the cost of work with titanium (Titanium has a really large melting point, then melting it into ingots needs a lot of energy), the price of titanium is increased.

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Answer:

50 mL

Explanation:

We can solve this problem by using Boyle's Law, which states that:

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Mathematically:

p\propto \frac{1}{V}

where

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The equation can be rewritten as

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where in this problem:

p_1 = 100 kPa is the initial pressure of the gas in the coke

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Solving for V2, we find the final volume:

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Answer:work function= 8.2×10-19J

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From this work function. We can obtain the minimum wavelength of light required. All these steps are shown in the image attached.

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