Who is lonely just like me

In which of the following sentences is the capitalized word or phrase used or placed incorrectly? a. ¿quién lo conoce á él? b. elena conoce a los dos. c. roberto conoce para maría y por alberto. d. ¿quién conoce a maría?

Some of your family members went to the shopping mall yesterday. look at the illustrations and complete each sentence with the correct form of the given verb. yo unos regalos para mi hermana menor. (comprar)

Find the electric charge in columb of 54g of al 3+ ion