chem question please help me?

Question

If a 3.30 lb cat absorbs 1.40 × 10−5 KJ of radiation, how many rads did this cat absorb?

Answer 1

A Rad is 1 J of energy/1 kg of mass,
You have to convert kJ to J and lb to Kg.
3.3 lb = 1.49 Kg
1.4 x 10^-5 KJ = 1.4 x 10^-8 J
1.4x10-8/1.49 = 9.4 x 10-9 rad

Answer 2

First let me tell you that the rad is an old unit of dosis, Youshould use the modern unit called Gray which is equal to 100 rads and corresponds to 1J by kg

Nethertheless, i try your problem

1 rad = 0.01 j/kg 1lb = 0.454kg
So your cat received
1.4 *10^-5 kJ for a weight of 0.454*3.3=1.362kG
and 1.40^-5/1.362=1.0310^-5 kJ/kg= 1.0310^-5*10^3=1.0310^-2j/kg = 1.03 rad
it is not a great dosis
She will survive . The most important is to feed that por beast

Answer 3

You've answered the question 1.40 x 10-5 KJ. The weight of the cat is irrelevant since u say it has absorbed that quanta of energy.