The reaction of atomic N with neutrons in the upper atmosphere
Answer:
At a greater value of pH, [H⁺] is really low.
Solution with pH = 8 has more [H⁺] than solution at pH =12.
Explanation:
pH = - log [H⁺]
10^-pH = [H⁺]
At pH = 8, [H⁺] = 10⁻⁸ → 1×10⁻⁸ M
At pH = 12, [H⁺] = 10⁻¹² → 1×10⁻¹² M
In conclussion, at a greater value of pH, [H⁺] will be really low.
Solution with pH = 8 has more [H⁺] than solution at pH =12.
1 mol ------- 6,02·10²³
X ------------ 3,98·10²³
X = 3,98·10²³/<span>6,02·10²³
<u>X= 0,6611</u> moles of oxygen
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Every 27.322 days, the moon circles the Earth. The moon takes around 27 days to spin once on its axis.
Answer:
See explanation
Explanation:
Molar mass of NaCl = 58.5 g
Number of moles contained in 10 g of NaCl = 10 g/58.5 g = 0.17 moles
If 1 mole of NaCl contains 6.02 * 10^23 atoms
0.17 moles of NaCl contains 0.17 * 6.02 * 10^23 atoms = 1.02 * 10^23 atoms
Molar mass of Fe II chloride = 126.751 g/mol
Number of moles = 10 g/126.751 g/mol = 0.0789 moles
Number of atoms = 0.0789 moles * 6.02 * 10^23 atoms = 4.7 * 10^22 atoms
Molar mass of Na = 23 g/mol
Number of moles = 10g/23 g/mol = 0.43 moles
Number of atoms = 0.43 moles * 6.02 * 10^23 atoms = 2.59 * 10^ 23 atoms
