the mass in grams of 1.00 x 10^23 molecules of N2 is 4.648 g
<u><em>calculation</em></u>
Step 1: use the Avogadro's constant to determine the moles of N2
According to Avogadro's law 1 mole = 6.02 x 10 ^23 molecules
? moles = 1.00 x 10 ^23 molecules
<em>by cross multiplication</em>
= (1 mole x 1.00 x10^23 molecules) / ( 6.02 x 10^23 molecules)
=0.166 moles of N2
Step 2 : find mass of N2
Mass = moles x molar mass
From periodic table the molar mass of N2 = 14 x2 = 28 g/mol
mass = 0.166 moles x 28 g/mol = 4.648 g
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The atomic theory started with Democritus, who stated that all space was made up of indivisible particles called atoms, though Aristotles refuted that statement by saying that matter didn’t exist, he believed in the four elements: air, fire, water, and earth. Then came Dalton, who revived Democritus’s ideas and proposed the law of multiple proportions, he revived the idea that all space was made of atoms. Soon after, J.J Thompson discovered the electron by using cathode rays. Max Planck developed the quantum theory by stating that electromagnetic radiation could only be emitted in quantized form (later called quanta). Einstein furthered this idea with studies of light. Robert Millikan eventually measured the charge of a single electron. Ernest Rutherford used a gold foil experiment and discovered the nuclei, considering his alpha particles were deflected by some object. Niels Bohr made the atomic model with electrons spinning around an atom’s nucleus, Erwin Schrodinger describes how electrons have wave like properties. James Chadwick then discovers the neutron!
There ya have it!
