2 KMnO4 (aq) + 5 H2O2 (aq) + 3 H2SO4 (aq) → 5 O2 (g) + 2 MnSO4 (aq) + K2SO4 (aq) + 8 H2O (l)
Dispersion forces are the only type of intermolecular force operating between non-polar molecules, for example, dispersion forces operate between hydrogen (H2) molecules, chlorine (Cl2) molecules, carbon dioxide (CO2) molecules, nitrogen tetroxide (N2O4) molecules and methane (CH4) molecules.
www.ausetute.com.au/intermof.html
Answer:
Atomic number
Explanation:
Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus. The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion (Z > 1).
The mole is simply an Avogadros number of anything( in this case Br atoms)
The Avogadro number is 6.022 x 10^23.
So no of moles = No of atoms / 6.022 x 10^23 = 2.03 x 10^24 / 6.022 x 10^23 = 3.37 Moles.
Answer: -
24.24 mL
Explanation: -
Mass of CaCO₃ = 1.212 g
Molar mass of CaCO₃ = 40 x 1 +12 x 1 + 16 x 3 = 100 g / mol
Number of moles of CaCO₃ =
= 0.01212 mol
The balanced chemical equation for the reaction that occurs when CaCO₃ is added to HCl is
CaCO₃ + 2HCl --> CaCl₂ + H₂O + CO₂
From the equation we see
1 mol of CaCO₃ reacts with 2 mol of HCl
0.01212 mol of CaCO₃ react with
= 0.02424 mol of HCl
Strength of HCl = 1 M
Volume of HCl required = Number of moles of HCl / strength of HCl
= 0.02424 mol / 1 M
= 0.02424 L
= 0.02424 x 1000 mL
= 24.24 mL