How many grams are in 7.4 moles of HgS?

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.)

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

What is the mass of 8 moles of sodium atoms