Cho hh hai kim loại Na và K td hết với H2O thu được 2.24 lít (đktc) và dung dịch b. Cho dung dịch td hết với dung dịch axit HCl, pthh sảy ra
NaOH + HCL --> NaCL + H2O
KOH + HCL --> KCL + H20
cô cạn dd thu được sau các pư trên thu được 13.3 gam muối khô gồm NaCL, KCL. Tính % khối lượng mỗi kim loại ban đầu

Cho hh hai kim loại Na và K td hết với H2O thu được 2.24 lít (đktc) và dung dịch b. Cho dung dịch td hết với dung dịch axit HCl, pthh sảy ra
NaOH + HCL --> NaCL + H2O
KOH + HCL --> KCL + H20
cô cạn dd thu được sau các pư trên thu được 13.3 gam muối khô gồm NaCL, KCL. Tính % khối lượng mỗi kim loại ban đầu

Đọc đoạn văn và trả lời true (T) hoặc false (F) Once upon a time, in an underwater kingdom, there was a mermaid princess. On her 18th birthday, the mermaid was allowed to come up to the surface. While she was enjoying the new view, she saw and rescued a handsome prince from drowning. The little mermaid returned to her kingdom but she still longed for the surface. Desperately, she sought out the Sea Witch who gave her a human form in exchange for her voice. She must also win the prince’s love, otherwise she would die.When the mermaid met the prince, he didn’t recognise her at all. Unfortunately, the prince didn’t know that she onced saved him and was in love with someone else. The only way to stay alive now was to kill the prince. Not able to do such a cruel act, the mermaid returned to the sea and waited for her death. However, thanks to her selflessness, she was returned into an immortal spirit.

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1. On her 18th birthday, the mermaid was allowed to come up to the surface. *

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2. The little mermaid returned to her kingdom but she still longed for the surface. *

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3. While she was enjoying the new view, she saw and rescued an ugly prince from drowning. *

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4. The only way to stay alive now was to kill the prince. *

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5. the mermaid returned to the mountain and waited for her death. *

Đọc đoạn văn và trả lời true (T) hoặc false (F) Once upon a time, in an underwater kingdom, there was a mermaid princess. On her 18th birthday, the mermaid was allowed to come up to the surface. While she was enjoying the new view, she saw and rescued a handsome prince from drowning. The little mermaid returned to her kingdom but she still longed for the surface. Desperately, she sought out the Sea Witch who gave her a human form in exchange for her voice. She must also win the prince’s love, otherwise she would die.When the mermaid met the prince, he didn’t recognise her at all. Unfortunately, the prince didn’t know that she onced saved him and was in love with someone else. The only way to stay alive now was to kill the prince. Not able to do such a cruel act, the mermaid returned to the sea and waited for her death. However, thanks to her selflessness, she was returned into an immortal spirit.

1.On her 18th birthday, the mermaid was allowed to come up to the surface. *
2. The little mermaid returned to her kingdom but she still longed for the surface. *
3. While she was enjoying the new view, she saw and rescued an ugly prince from drowning. *
4. The only way to stay alive now was to kill the prince. *
5. the mermaid returned to the mountain and waited for her death. *

TÌM LỖI SAI TRONG CÂU VÀ GHI LỖI SAI ĐÓ RA VÍ DỤ: I like watch TV => watch
1. Cloud watching sound weird, but Hang adores it. 
2. I play football yesterday afternoon *
3. I am reading book at 10 p.m yesterday. *
4. While I was taking a bath, she was use the computer. *
5. Snow White lived happy with the dwarves in the wood. *

a/ Viết chương trình tính số tiền điện cần phải thanh toán của 1 hộ gia đình được tính như sau:
+ 100KW (còn gọi là số đầu tiền), mỗi số phải trả 650đồng
+ từ 101 số trở lên, mỗi số phải trả 1200 đồng
b/ dịch và chạy chương trình với số điện tiêu thụ 120KW

Câu 1
a/ viết chương trình diện tích S của tam giác với độ dài a và chiều cao tương ứng h (a,h là số thực được nhập vào từ bàn phím)
b/ dịch và chạy chương trình với a = 12, h = 6