In: Chemistry
In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B.
2A->3B
How many molecules of substance B are produced when 29.7g of substance A reacts? The molar mass of substance A is 28.8 g/mol.
Step 1: Convert the mass of A to moles.
Step 2: Convert the number of moles of A to the number of moles of B.
Step 3: Convert the number of moles of B to molecules of B.
mass of A = 29.7 g
molar mass of A = 28.8 g/mol
number of moles of A = mass /molar mass
= 29.7/28.8
=1.03125 mol
Moles of B formed = (3/2)*number of moles of A
=(3/2)*1.03125 mol
=1.546875 mol
Number of molecules of B = Moles of B * AVogadros number
=1.546875*(6.022*10^23)
=9.32*10^23 molecules
Answer: 9.32*10^23 molecules