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DiKsa [7]
2 years ago
12

Subtract x^2-6x+4 from 2x^2+4x-8

Mathematics
1 answer:
Rasek [7]2 years ago
3 0
2X^2+4X-8-X^2+6X-4
X^2+4X-8+6X-4
X^2+10X-12
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Determine the number of atoms in<br> 98.3 g mercury, Hg
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The answer is 2.95 × 10²³ atoms

Atomic mass is 200.59 g.
So, 1 mole has 200.59 g. Let's calculate how many moles have 98.3 g:
1M : 200.59g = x : 98.3g
x = 98.3 g * 1 M : 200.59 g = 0.49 M

To calculate this, we will use Avogadro's number which is the number of units (atoms, molecules) in 1 mole of substance:

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<span>How many atoms are in 0.49 mole:
</span>6.023 × 10²³ atoms : 1M = x : 0.49M
x = 6.023 × 10²³ atoms : 1M * 0.49M = 2.95 × 10²³ atoms
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