Hòa tan 1,8 gam muối sunfat khan của một kim loại hóa trị II trong nước, rồi thêm nước cho đủ 50 ml dung dịch. Để phản ứng với 10 ml dung dịch này cần vừa đúng 20 ml dung dịch BaCl₂ 0,15M. Công thức hóa học của muối sunfat là 

A. CuSO₄.

B. FeSO₄

C. MgSO₄

D. ZnSO₄.

Every students in those five room must bring all own books to class.

GOOD LUCK!!!

1. She's a tall and thin woman.

2.He is a strong weight lifter.

3.She's a light gymnast.

4.It is the short pencil.

5.She is a beautiful girl.

There are 22 players in a football match.

Bài 2:

To play badminton you need a shuttlecock, a net and two rackets.

Mik chỉ bt vậy thôi nha bn!!!

In the free time I play volleyball.

I listen to music and do my homework exeryday.

When it's hot, I often go to the beach.

Hoc24 ko thay tên đc nha bn!!!

He dropped his bone into the water and decided to jump down.

*1

1. I visited Bana Hills last summer

2.They went skiling 3 months ago

3.Nam is doing his homework at the moment

*2

1. I like the living room best in my house

2.How about going to Sa Huyng Coffee tonight?

3.You mustn't talk too much in the class