Tính nồng độ của hai dung dịch axit clohiđric trong các trường hợp sau:

a) Cần phải dùng 150ml dung dịch HCl để kết tủa hoàn toàn 200g dung dịch AgNO3 8,5%.

b) Khi cho 50g dung dịch HCl vào một cốc đựng NaHCO3 (dư) thì thu được 2,24 lít khí ở đktc.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentence in the following questions.

The plants may develop differently. The plants live on that island.

A. The plants which live on that island may develop differently

B. The plants live on that island may develop differently

C. The plants which lives on that island may develop differently

D. The plants which live that island may develop differently

Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following.

Whenever problems come up, we discuss them frankly and find solutions quickly

A. clean

B. encounter

C. arrive

D. happen