Question

How many neutrons are in 0.025 mole of the isotope 24
54
Cr
A) 1.5 × 1022 neutrons
B) 3.6 × 1023 neutrons
C) 4.5 × 1023 neutrons
D) 8.1 × 1023 neutrons
E) 2.4 × 1025 neutrons

Answer 1

Answer:

option c is correct

no. of neutrons = mole × neutron present in atom ×6.02×10^23 here mole is 0.025 and neutron in chromium ,,,54 molar mass and 24 atomic no. then neutron is 54-24 means 30 put the value in the formula ..... no. of neutrons= 0.025×30×6.02×10^23 after solving this no. of neutrons is 4.515×10^23