A substance requires 18.45 kJ of heat to raise its temperature from 20°C to 225°C. If the mass of the substance is 200 g, what is the specific heat of substance? What is this substance? NEED HELP DO TODAY

The answer you are looking for is option d

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m

The correct answer is:   [c]:     "it is the minimum amount of material needed to sustain a fission  reaction."