A mystery compound is made of 35.51% carbon, 4.77 % hydrogen, 37.85% oxygen 8.39% nitrogen and 13.60% sodium a) What is its empirical formula? Show your work. (b) The molar mass of the compound is 169g / mol What is the molecular formula of the compound? Show your work .

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.)

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Why is the structure of molecule important to its function?