When 895-j of heat is applied to a sample of iron metal the temperature increases by 55.0 c. determine the mass of the metal sample answer?

The amount of heat Q needed to increase the temperature of a substance by  is given by

where
m is the mass of the substance
is the specific heat capacity of the substance
is the increase of temperature

For iron, the specific heat capacity is . The amount of heat supplied to this sample is Q=895 J and the temperature increases by , so we can re-arrange the previous formula to find the mass of the sample:

So what is the question