The diagram below shows fossils and rock features. How does intrusion X compare to the ages of the other rock layers and fossils in this geologic column?

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.)

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Which other elements contain the same number of outer electrons as sodium