What volume would 4.5 moles of helium gas occupy at STP?

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 molecules are found in 1.32 mol of nacl?

Which statement can best be concluded from the ideal gas law?