3 years ago

A(n) ____________________ has a rectangular shape and contains a cell wall, chloroplasts, and one large vacuole.

Chemistry

1 answer:

tiny-mole [99]3 years ago

7 0

I’m pretty sure the answer is “plant cell”

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The thin outer layer of Earth, called the crust, contains only 0.50 percent of Earth's total mass and yet is the source of almos

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The mass of silicon in kilograms in Earth's crust is $7.2729\times 10^{21} kg$ .

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Mass of Earth = $5.9\times 10^{21} tons$

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(1 lb =453.6 g)

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Mass of earth crust = M

$0.50\%=\frac{M}{5.3524\times 10^{27}}\times 100$

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Percentage of the silicon in Earth's crust = 27.2 %

Mass of silicon in in Earth's crust = m

$Si\%=\frac{m}{M}\times 100$

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The mass of silicon in kilograms in Earth's crust is $7.2729\times 10^{21} kg$ .

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