The density of solid lead (Pb) at room temperature is 11.35 g/cm3, while the density of liquid lead at its melting point of 327°C is 10.68 g/cm². Why is the density of the liquid lead slightly lower?

A The liquid lead atoms are less likely to move in a given amount of space than the solid lead atoms.

B The liquid lead atoms have a slightly larger atomic radius than the solid lead atoms.

The liquid lead atoms are less closely arranged in a given amount of space than the solid lead atoms.

D

The liquid lead atoms have slightly less kinetic energy than the solid lead atoms.

Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.