Hey, this is the last question on my online chem homework and I've tried for hours to figure out the answer. Any help is appreciated, and honestly i'm really tired at this point, so if you want to skip right to the answer that's fine.
Question: How many moles of atoms are contained in each of the following?
A: 7.10 x 1024 NH4NO3 molecules
Chem Question (Atoms to Moles)?
2017-11-29 1:53 pm
回答 (2)
2017-11-29 3:33 pm
✔ 最佳答案
Each mole of substance contains 6.022 × 10²³ molecules/mol.(OR: You may use 6.02 × 10²³ instead.)
No. of moles of molecules = (7.10 × 10²⁴ molecules) / (6.022 × 10²³ molecules/mol) = 11.8 mol
Each moles of NH₄NO₃ contains 9 moles of atoms (2 moles of N, 4 moles of H and 3 moles of O atoms).
No. of moles of atoms = (11.8 mol) × 9 = 106 mol (3 sig. fig.)
2017-11-29 3:28 pm
In each molecule of NH4NO3 there are 1 + 4 + 1 + 3 = 9 atoms.
(7.10 x 10^24 NH4NO3 molecules) / (6.022 x 10^23 molecules/mol) x (9 mol atoms / 1 mol NH4NO3) = 106 mol atoms
(7.10 x 10^24 NH4NO3 molecules) / (6.022 x 10^23 molecules/mol) x (9 mol atoms / 1 mol NH4NO3) = 106 mol atoms
收錄日期: 2021-04-18 17:59:10
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