Which of the following metals is obtained from its ore by heating?
A Aluminium
B. Calcium
C Iron
D. Lead
F Mercury please hlp

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

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: