I have had my ficus tree for about 1 month. Now the leaver are falling off and they look like they are dying. I water it once a week and it is in my office. What can I do to nurse it back to good health. Is this normal for it to lose all of its leaves?

I know that ficus trees do not like change. You have had it for about a month and it will need time to adjust. It is normal for them to lose a lot of leaves shortly after a change like this.