hòa tan hoàn toàn 4,95 gam hỗn hợp hai kim loại X và Y thuộc 2 chu kì của nhóm IA vào nước thì thu được 2,8 lít khí hiđro (ở đktc).Tìm X Y biết số mol X gấp rưỡi lần số mol Y

Viết sự oxi hóa sự khử và cân bằng pt Al+h2so4->al2(so4)3+s+h2o KMno4+h2c2o4+h2so4->k2so4+MnSo4+h2o

Giúp mình ý c và d với mình sẽ vote 5*

riboxom có phải rARN không? chiều dài của ARN so với ADN? vì sao

để tạo 1 thư mục trên máy tính thì ta sử dụng phím tắt nào?

MONG MN GIÚP Ạ♡♡♡ Viết lại câu: 1. How old is your father? - What is... 2. My brother drinks more coffee than my sister does - My sister does... 3. You should wear your coat when going out - You'd... 4. It is very in teresting to know how to swim - Knowing... 5. My brother would rether stay at home than go out - My brother likes... 6. Will you look after the house while we are away? - Will you please take...

Vẽ............. chibi......... Thế thôi ................ ............Hết.............. .....The end.........

Giúp mik nhé mai nộp rồi nha 😘😘😘😘😘😘

Giải hộ mik 2 câu này với(mai phải nộp rồi😓😓😓)

III. Reading a) Use the suitable words in the box to complete the text Near old to garden bathroom small пew I live in a house (example) ...near....the sea. It's an (1)...... it's very (2) .... bathroom is downstairs next (4) lovely fireplace. There's a garden in front of the house. The (5)..... and in spring and summer there are flowers everywhere. b) Read the text and answer the questions I have two sisters, Mary and Jane, and two brothers, John and Tom. Mary is nineteen. Jane is five years younger than Mary, but she is two years older than Tom. Tom is four years younger than me, and he is seven ... ..house, about 100 years old, and .There are two bedrooms upstairs but no (3) ....The ... .the kitchen and there is a living room where there's a ..... ...goes down to the beach years younger than John. 1. Who is the youngest? 2. How old is Tom?.... 3. Is Jane younger than me?. 4. Am I the oldest in my family? 5. Who are the twins?.