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laiz [17]
3 years ago
10

3.

Chemistry
1 answer:
pav-90 [236]3 years ago
8 0

Answer:

=1.76gCa

Explanation:

Hello there!

In this case, according to the given atoms of calcium, it is possible to calculate the mass of this element by considering that the definition of mole is in terms of atoms and also the atomic mass of calcium:

1molCa=6.022x10^{23}atoms Ca=40.08gCa

In such a way, by considering the following setup, we can obtain:

=2.65x10^{22}atomsCa*\frac{1molCa}{6.022x10^{23}atoms} *\frac{40.08gCa}{1molCa}\\\\=1.76gCa

Best regards!

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Answer:

96,532,000,000,000,000,000,000 ions.

Explanation:

  • Assume the highest concentration of HCl in the stomach (160 mmol/L) that is in the canaliculi.
  • This means that 1.0 L of the stomach acid contains 0.160 mol.
  • Every 1.0 mole of HCl contains Avogadro’s number of molecules (6.022 x 10²³) molecules.
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<u><em>Using cross multiplication:</em></u>

1.0 mole of HCl → 6.022 x 10²³ H⁺ ions.

0.160 mole of HCl → ??? H⁺ ions.

∴ The no. of H⁺ ions in 1 liter of stomach acid = (6.022 x 10²³ H⁺ ions)(0.160 mole of HCl) / (1.0 mole of HCl) = 9.6352  x 10²² ions = 96,532,000,000,000,000,000,000 ions.

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38

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Which of the following sets of characteristics describe what we know about the inner planets?
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Answer:

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