How many single covalent bonds can halogens form?

What is the molar mass of a gas that has density of 2.054 g/l

If 4.8 moles of x and 3.4 moles of y react according to the reaction below, how many moles of the excess reactant will be left over at the end of the reaction? 3x + 2y “yields”/ x3y2. a. 1.7 mol y left over b. 1.6 mol x left over c. 0.2 mol y left over d. 0.1 mol x left over

How does the kinetic energy of a substance's particle in the solid phase compare to their kinetic enegy in the liquid phase?