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kirill115 [55]
2 years ago
8

How does an object look when it is viewed through an opaque object ​

Chemistry
1 answer:
Alexxx [7]2 years ago
7 0
You can not see between opaque materials because light cannot pass through them.
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How many atoms are in 165 g of calcium?
vesna_86 [32]

             <span> Find the molar mass of calcium acetate...158.165g.
So start with 255g Calcium acetate x 1 mole Calcium Acetate/158.165 g Calcium Acetate x 6 mol Hydrogen/1 mole Calcium Acetate x 6.022e23 atoms/mole.

So...(255 x 1 x 6 x 6.022e23)/(158.165 x 1 x 1) = 5.825e24 hydrogen atoms</span>

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