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  1. a milliliter is also one cubic cm. You have 1000 of those units. Multiply the density by 1000 to get the mass.

    2 Answers · Science & Mathematics · 29/06/2019

  2. The energy of the n=1 level is -13.6 eV relative to the electron being at infinity. So the required energy (ionization energy) is 13.6 eV.

    3 Answers · Science & Mathematics · 01/06/2019

  3. [H⁺] [OH⁻] = Kw Hence, [OH⁻] = Kw / [H⁺] = (1.0 × 10⁻¹⁴) / (1.2 × 10⁻⁵) M = 8.3 × 10⁻¹⁰ M

    1 Answers · Science & Mathematics · 07/08/2019

  4. (0.00101 kg H/mol x 2) + 0.0321 kg S/mol + (0.016 kg O/mol x 4) = 0.0981 kg/mol H2SO4 (15.9 mol) x (0.0981 kg/mol) = 1.56 kg

    2 Answers · Science & Mathematics · 22/05/2019

  5. change in energy = R(1/3² - 1/5²) = 1.55e-19 J and change in energy = hv / λ so λ = hv / change in energy = 6.626e−34J·s * 2.998e8m/s / 1.55e-19J λ = 1.282e-6 m = 1.282 µm = 1282 nm

    2 Answers · Science & Mathematics · 14/06/2019

  6. H2 + I2 → 2 HI 1.56 mol HI x (1 mol H2 / 2 mol HI) = 0.78 mol H2 reacted 1.00 mol originally - 0.78 mol reacted = 0.22 mol H2 (or I2) at equilibrium Keq = [HI]^2 / ([H2] [I2]) = (1.56 mol HI...

    1 Answers · Science & Mathematics · 31/05/2019

  7. The reverse reaction is already given, you just have to read from right to left: 2HBr(g) <=> H2(g) + Br2(g)

    1 Answers · Science & Mathematics · 16/05/2019

  8. ... forces) .... there will also be Debye forces - Hydrogen Bonds - Ion-Dipole Forces .... for this you need an ion...

    2 Answers · Science & Mathematics · 25/08/2019

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