What is the density of a liquid that has a volume of 20.0 mL and a mass of 15.8 grams?

Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

How many moles are in 123.0 grams of kclo4?