· A 8.0-g piece of iron absorbs 1000 joules of heat energy, and its temperature changes from 25°C to 75°C. Calculate the specific heat capacity of iron. A. 2.5 J/gº C
B. 5.4 J/gº C
C. 1.3 J/g° C
D 3.1 Jg° C​

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Select all that apply. using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 (s) pb+2(aq) + 2cl -(aq). the concentration of the products yield a ksp of 2.1 x 10-2: