Hi, how do you find the mass of NaCl? (not molar mass btw lol)

In an oxidation-reduction reaction, oxidation is what happens when a reactant

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?