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zheka24 [161]
3 years ago
6

Review

Chemistry
1 answer:
ZanzabumX [31]3 years ago
7 0

Answer:

1. Gold is valuable because of its high quality physical and chemical properties

2. The gold mines where the state's property in both Egyptian and Roman civilizations

3. The elixir of life is akin to the philosopher stone. It is a chemical portion that when drank, grants eternal life

4. The contribution of alchemists to modern chemistry, includes the formulation of the first ideological periodic table, the distillation process, metalworking, gunpowder, glass, ink, paints, cosmetics and many other innovations

Explanation:

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A beaker contains 20.0 ml of a 50.0 g/L solution. What will the new concentration be if you add 40.0 mL of water?
Ronch [10]

Answer:

moles SO42- = 0.0500 L x 0.20 M=0.010

moles Ba2+ = 0.0500 L x 0.10 M = 0.0050

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[Br-]= 0.50 / 0.50 L = 1 M

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3 years ago
In a stadium, fans stand up and sit down to produce a wave across the stadium. This type of wave where the material travels perp
elena-14-01-66 [18.8K]
Transverse wave is <span>a wave vibrating at right angles to the direction of its propagation.

In short, Your Answer would be Option B

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