Thêm dần V ml dung dịch NaOH 0,2M vào 100 ml dung dịch acid CH3COOH 0,4M. Tính pH của dung dịch trong bình phản ứng ở các thời điểm: a. V = 0 ml b. V= 100 ml c. V = 200 ml

1.solid

2.carbon dioxide

3.helium

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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