Wich field of science studies the composition and structure of matter

For a single H2 molecule, H2 → 2H, the dissociation energy is 4.52 eV. How much energy would have to be put in (in kJ) to dissociate a mole of hydrogen molecules?

Which of the following does not follow the kinetic molecular theory? Gas molecules have negligible volume. Gas molecules do not have mass. The average kinetic energy of gas molecules is proportional to the temperature of the gas molecules.

What chemical reaction is SiCl2>Si+Cl2

How can you tell that an ionic bond is formed between magnesium and oxygen?

If 75 grams of oxygen react, how many grams of aluminum are required?

Zoom all the way in to Daphne Major. Describe its appearance in two sentences.

An alloy contains 56 g of pure silver and 17 g of pure copper. What is the percentage silver in the alloy

Suppose there is 0.63 g of HNO3 per 100 mL of a particular solution. What is the concentration of the HNO3 solution in moles per liter?

Of the three thermodynamic quantities, δg, δh, δs, which is most useful for determining spontaneity of a reaction?

Does the density of an object depend on its size? Explain?.