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Alona [7]
3 years ago
8

What is true of tectonic plates?

Chemistry
1 answer:
kupik [55]3 years ago
3 0

Answer:

Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. ... The lithosphere includes the crust and outer part of the mantle.

Explanation:

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Determine the percent water in MgSO4*7H20?
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Answer:

\% H_2O=51.2\%

Explanation:

Hello!

In this case, since the percent water is computed by dividing the amount of water by the total mass of the hydrate; we infer we first need the molar mass of water and that of the hydrate as shown below:

MM_{MgSO_4* 7H_2O}=120.36 g/mol+7*18.02g/mol\\\\MM_{MgSO_4* 7H_2O}=246.5g/mol

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\% H_2O=\frac{7*18.02}{246.5} *100\%\\\\\% H_2O=51.2\%

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