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Step2247 [10]
3 years ago
9

Just help frllllllllllllllllllllllllllllllllllll

Chemistry
1 answer:
Naya [18.7K]3 years ago
8 0

Answer: 2 The Proximity toward the ocean

Explanation:

May i plz have brainiest  

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For which of the following activities might you want to hire a chemist?
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OPTION (A) : Testing a rock sample for gold content

Explanation:

For testing a rock sample of gold content you will need a Chemist. To test the material, the sample is rubbed on black stone which will leave a mark on the stone. This mark is tested by applying aqua fortis i.e nitric acid on the mark. If the mark gets dissolve then the material is not gold. If the mark sustain the it is further tested by applying aqua regia i.e nitric acid and hydrochloric acid which will prove the sample is of gold if it gets dissolve on using hydrochloric acid. The purity of the sample can be checked by differing the concentration of the aqua regia and comparing it with the gold material of the known purity.

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What is the mass number of an atom with 17 protons, 17 electrons, and 20 neutrons?
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I hope this helped!
3 0
4 years ago
2. Hydrogen gas at a temperature of 22.0°C that is confined in a 5.00L cylinder exerts a pressure of 4.20atm. If the gas is rele
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Explanation:

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