Explanation: Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans.

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3 years ago

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The philosopher Socrates was executed using which poison?

Vikki [24]

The philosopher Socrates was condemned to death for impiety. He was executed via Hemlock Poisoning. Hemlock is a flowering plant, related to carrots. It is known to affect the nervous system resulting to paralysis. The paralysis includes the paralysis of respiratory muscles which will impede respiration and result in death. The most potent part of the plant is the seeds and roots.

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3 years ago

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Calculate the theoretical percentage of water for the following hydrates.

Svetradugi [14.3K]

Answer:

(a) $\% H_2O=10.65\%$

(b) $\% H_2O=32.2$

Explanation:

Hello.

For this questions we must consider the ratio of the molar mass of water to hydrated compound molar mass as shown below:

(a) In this case, we can consider that inside the manganese (II) sulfate monohydrate, whose molar mass is 169.02 g/mol, there is one water molecule that has a molar mass of 18 g/mol, for which the theoretical percentage of water is:

$\% H_2O=\frac{18g/mol}{169.0g/mol} *100\%\\\\\% H_2O=10.65\%$

(b) In this case, we can consider that inside the manganese (II) sulfate tetrahydrate, whose molar mass is 223.1 g/mol, there are four water molecules that have a molar mass of 4*18 g/mol, for which the theoretical percentage of water is:

$\% H_2O=\frac{4*18g/mol}{223.1g/mol} *100\%\\\\\% H_2O=32.27\%$

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3 years ago

How many electrons are in the second ring of sodium​

How many electrons are in the second ring of sodium