JEE Main 202120 Jul, Morning shiftChemistryMediumSome Basic Concepts in Chemistry88× since 2002
250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl. The number of unreacted HCl molecules in the solution after complete reaction is ___________ 10²¹. (Nearest integer)
(N_A = 6.022 10²³)