Description of the experiment
1. You must have a piece of chalk and record the weight before writing the name.
2. You write the name Valeria on a blackboard.
3. You record the weight of the chalk last, after writing the name.
Calculations:
The variables will be:
Initial mass=Mo
Final mass = Mf
Mass of chalk used=M
[tex]M=M_f-M_o[/tex]We must calculate the moles of chalk used. Since chalk is CaCO3 and its molar weight is 100.1g/mol, the moles of CaCO3 will be:
[tex]molCaCO_3=\frac{M}{100.1g/mol}[/tex]The number of atoms must be found with Avogadro's number, we will have to:
[tex]NumberofAtoms=molCaCO3\times6.022\times10^{23}atoms/mol[/tex]That is the description of how you should do the experiment and the calculations to find the number of atoms
