The formula of copper sulfate crystals is CuSo4.5H2O. 400ml of 0.02mol/l copper (ii) sulfate solution is needed to be prepered . a. calculate the molar mass of the solute .
b. calculate the mass of the solute that sould be weighted to prepare this solution .
c. describe in details the steps of preperation of the solution​

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Can someone me with these questions plz.

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh