I kill him by telepathy

dc đấy

chẹp, voãi lun á

Uo

đêm rồi lên mấy khứa hsg đi ngủ hết rồi bn ạ

Giải:

Khối lượng Nacl có trong 1kg dung dịch là:

mct = mdd.c% = 1 x 0,9% = 0,009 (kg)

Khối lượng dung môi có trong 1kg dung dịch là:

1 - 0,009 = 0,991 (kg)

Cách pha chế 1kg dung dịch Nacl nồng độ 0,9% như sau:

Lấy 0,991kg nước để hòa tan hoàn toàn 0,009 kg Nacl ta sẽ thu được dung dịch Nacl nồng độ 0,9%

eazy

chịu thui tham khảo tư liệu đi

chịu ko làm đc

Là sao tôi vẫn không hiểu nghĩa của câu hỏi này lắm :/

Bạn chụp thiếu thì phải :?

ah bn ơi trên 2 câu trả lời mới mở đc nhé nó bj lỗi ấy

chịu

khoan đã bọn mày làm thiếu bài tập cách 2 nhé?

Ceremony: The ceremony was held in the school yard, and all students wore uniforms. Contestant: Each contestant tried their best, so the competition became very exciting. Longevity: People believe that exercise is important, because it helps improve longevity. Monk: The monk lives a simple life, but he is respected by many people.

Igloo: The Inuit built an igloo because the weather was extremely cold.

Interact: Students can interact with teachers online, so learning becomes more flexible. Musher: The musher controlled the dogs carefully, while the race was taking place.

Tap: Turn off the tap after use, so that we can save water.

Function: Each part of the machine has its own function, and they work together.

Hyperloop: Hyperloop is a modern transport system, but it is still being developed.

Ferry: We went to the island by ferry, because there was no bridge.

Bullying: Bullying should be stopped, because it seriously affects students’ mental health. Post: The sign was fixed to a post, so everyone could see it clearly.

Statue: The statue was built many years ago, and it represents a national hero.

Wooden: The house is wooden, but it is very strong and beautiful.

• Many people live in coastal areas near the sea.
  (Nhiều người sống ở vùng ven biển.)
• My hometown is a coastal city with beautiful beaches.
  Quê tôi là một thành phố ven biển có những bãi biển đẹp.
• Fishing is an important job in coastal regions.
  Đánh cá là một nghề quan trọng ở các vùng duyên hải.
• Coastal towns often have fresh seafood.
  Các thị trấn ven biển thường có hải sản tươi.
• We visited a coastal village during our summer holiday.
  Chúng tôi đã thăm một ngôi làng ven biển trong kỳ nghỉ hè.

đúng thì cho mik 1 tick nhá mik cảm ơn

Hospitality is a universal feature of Vietnamese ethnic cultures, emphasizing community ties.

khó vậy