1. Hãy cho biết có bao nhiêu loại liên kết hóa học tồn tại trong phân tử các chất trong thực phẩm. Cho biết bản chất, đặc điểm của các loại liên kết này. Ví dụ minh họa.

What is the force of attraction between the particles in a salt crystal

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

Calculate: select the worksheet tab. this tab you calculate the analyte concentration.  fill in the first set of boxes ("moles h2so4" and "moles naoh") based on the coefficients in the balanced equation. (if there is no coefficient, the value is 1.)  record the appropriate volumes in the "ml naoh" and "ml h2so4" boxes.  record the concentration of the titrant in the m naoh box. click calculate. what is the concentration listed