If 25cm3 of Sodium hydroxide solution containing 4.0g per litre of solution neutralized 50cm3 ofa mono basic acid, HK containing 1.8g of acid, calculate the relative formula mass of the acid

Relative formula mass of the acid = (1.8 g/50 cm3) x (1000 cm3/1 L) x (1000 mL/1 L) x (1 mL/1 cm3) = 36 g/mol