Compute the difference in masses of 10^3 moles each of magnesium atoms and magnesium ions. (Mass of an electron = 9.1×10–31 kg)

(a) The mass of 1 mole of nitrogen atoms is 14g.  (b) The mass of 4 moles of aluminium atoms is (4 × 27)g = 108g  (c) The mass of 10 moles...

Number of moles 12 / 24 = 0.5 mol 

(a) CO2 has molar mass               = 44g mol–1  5 moles of CO2 have molar mass = 44 × 5               ...

A sodium atom and ion, differ by one electron. For 100 moles each of sodium atoms and ions there would be a difference of 100 moles of electrons.  Mass of 100...

1 mole of oxygen atoms = 6.023×1023 atoms  ∴Number of moles of oxygen atoms =   2.58 ×1024 / 6.022×1023                             ...

(a) Mass of sodium atoms carried by Krish = (5 × 23) g = 115 g While mass of carbon atom carried by Raunak = (5 ×12) g = 60g...

5.85 g of NaCl = 5.85/ 58.5= 0.1moles   or 0.1 moles of NaCl particle  Each NaCl particle is equivalent to one Na+ one Cl–  ⇒ 2 ions  Total moles of ions = 0.1 ×...

Mass of 1 mole of aluminium atom = the molar mass of aluminium  = 27 g mol–1  An aluminium atom needs to lose three electrons to become an ion, Al3+  For one mole...

The atoms of X lose electrons whereas the atoms of Y gain electrons. Thus, there is transfer of electrons from atoms of X to atoms of Y. The bond formed...

(b) : 1mole of Mg3 (PO4 )2 => 3moles of Mg atom + 2 moles of P atom + 8 moles of O atom 8 moles of oxygen atoms are present in...