Reading 313 times "hasbunallah wa nimal wakeel"

Q: Some Muslim scholar have said that a guy called him and told him that he saw Nabi Muhammad (sallallahu alaihi wasallam) in his dreams and he asks to read 3 times Surah Fatiha, 3 times Surah Ikhlas and 313 times "hasbunallah wa nimal wakeel".

My question is that is there any hadeeth related to 313 times reading "hasbunallah wa nimal wakeel". Please advise for the above in the light of Islam.

Meaning of jealousy

Q: Is jealousy and envy the same sin... If jealousy is felt without the intention of harm, will it be considered as a sin because sometimes I feel jealous for loved ones who get attached to any other person and don't give time to me... Is this the same as envy or is it normal because I have no intention of harm?

Wasting food and helping people

Q:

1. Is it permissible to throw +/- 10 tons of wheat and rice in the middle of the sea from a boat as food for sea creatures, even though we know that a vast majority of humans are hungry. What does Islām say?

2. I heared a Hadith saying that a person has to fulfill the needs of other persons,

My question is that, how to avoid and discourage people from asking or does one have to fulfill their requirements?

Parents explaining to their son about puberty and related issues

Q: My son is about to be 11 years old. My husband and I have started to observe the signs of puberty in him. My husband has decided to give him a talk about the respective topic including sex. The concern is my husband states that the mother of the child must be present whenever this talk is to take place so that if a child has any query regarding the topic concerning the role of a female, a mother is the best source to provide an answer with basic guidelines. In Islam, is the presence of mother a must with respect to above situation?

Performing salaah a few degrees away from the qiblah

Q: I would like to confirm if the following is correct: 

1. Someone told me that when reading salaah, when facing the qibla, if you are a few degrees wrong then it is maaf.

2. If someone is reading salaah facing the wrong direction then you must turn them towards the right direction or tell them and they can turn to the right direction without breaking their salaah and their salaah will be accepted. 

Hurmat-e-musaaharah if one did not get an erection

Q: Does hurmat-e-musaaharah become established if a person does not get any movement/erection in his private part, but he is not sure if he gets any arousing feeling in his private part. He was also feeling scared and in his heart he had thoughts like he was feelimg lust however he did not get any erection/movement. He was scared that he will cause hurmat. He did not get any sexual thoughts (which may have triggered lust).