A first-order reaction is 75.0% complete in 320 seconds. What are the first and second half-lives for this reaction? a) First half-life: 106.7 s, Second half-life: 213.3 s b) First half-life: 160 s, Second half-life: 320 s c) First half-life: 213.3 s, Second half-life: 426.6 s d) First half-life: 320 s, Second half-life: 640 s
