Giúp em bài 1 ạ

Sửa hai bài này dùm em với ạ From Le Thanh Hai to Me: (Direct Message) 04:07 PM From: Sandy Subject: Your visit Dear, For me, that is a great week. We can play and study together.So it is very good for each other. With the first day of the week, I think we should go out for entertainment to prepare for another day so I shall go to the concert and it will make us more comfortable. In my opinion, it is not a good choice because it can cause some problems and our parents will not know about it. Instead of climbing, we can have better activities like play sports at home or go camping. That is a very nice option. See you at your house, Hai From: Ngan To: Sandy Hello Sally, I'm just as excited as you that I’m coming to stay with you for a week. Definitely that day would be great In my opinion, going to a concert is better than staying at home because there's music and everyone there is very happy. I don’t think that is a good idea because I'm pretty scared of heights and we'll probably get very tired when we go. In conclusion maybe it would be better to have a party in the garden I think it would be great That’s my idea, See you soon Ngan

Tính 12,046. 1023 nguyên tử Oxi nặng bao nhiêu gam?

Một hợp chất gồm 1 nguyên tử X liên kết 2 nguyên tử Clo và nặng hơn phân tử hidro là 63,5 lần. a/ Tính phân tử khối hợp chất? b/ Tính NTK của X , cho biết tên và KHHH của X?

Nguyên tử của một nguyên tố A có tổng số hạt proton, nơtron, electron là 93, trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 23. Tính số hạt mỗi loại? Cho biết tên nguyên tố A