Step-by-step explanation:
mole = mass/molar mass
mole of Nacl = mass/mm
molar mass of Nacl = Na + Cl = 23+35=58
mole of NaCl = 29/58
mole of NaCl = 0.5mol
H2SO4 + NaCl ====> HCl + Na2SO4
1. 1. 1. 1
since mole of NaCl is 0.2mol then mole of HCl is also 0.2mol since they are all in the same ratio
mole of HCl = Mole of NaCl = 0.5mol
mass of HCl = ?
molar mass of HCl = H + Cl = 1+ 35=36
mole of HCl = mass /molar mass
0.5= mass/36
mass = 0.5×36 = 18 grams