What is the concentration of K+ in a 0.640 MK3PO4 solution?

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 moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Why is retrograde motion an apparent motion