10 Use the data in the table to predict the density of rhenium.
Write your answer below.
(2 points)
Element
Density
(g/cm)
Element
Density
(g/cm)
Element
Density
Element
Density
(g/cm)
Element
(g/cm)
Density
(g/cm”)
vanadium
5.96
chromium
7.19
manganese
7.2
iron
7.86
cobalt
8.9
niobium
8.57
molybdenum
10.2
technetium
ruthenium
12.3
rhodium
12.4
tantalum
16.6
tungsten
19.4
rhenium
osmium
22.5
indium
22.5
Enter your answer

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.