One of the best Nuyoricanswriters,in 1973, she became the first Hispanic woman in the modern times to have her literary works published by the major commercial publishing houses, and she has developed the longest career as a creative writer for these publishing houses than any other Hispanic female writer.Her works tell of growing up in the Puerto Rican communities of the Bronx and El Barrio and of the difficulties Puerto Rican women face in the United States.
Mohr was raised in the Bronx. In 1973, her book "Nilda", which traces the life of a teenage Puerto Rican girl who confronts prejudices during the World War II era in New York, was awarded the Jane Addams Children Book Award.
In 1975, her second book "El Bronx Remembered" was awarded the New Times Outstanding Book Award, thus becoming the first female Hispanic to receive such an honor.
From 1988 through 1991, she taught atQueens College, City University of New York. From 1994 through 1995, she was Writer-in-Residence at Richmond College, the American University in London.