Example 60 mice, each weighing 2 kg, were used in a lethal dose (LD50) experiment. The number of death mice versus the mass of substance A given to each mouse presented in the Figure below. 70 60 50 40 Sulistane A Substab 20 10 OS 10 15 20 2 0 35 40 Mass of Substance gven to each mouse (mg) Calculate the lethal dose (LD50) of substance A and B seperately. • Which one of the substances is more toxic? 12 Number of death mice
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
![Example
60 mice, each weighing 2 kg, were used in a lethal dose (LD50)
experiment. The number of death mice versus the mass of
substance A given to each mouse presented in the Figure below.
70
60
E S0
40
30
ultann A
E 20
10
10
15
20
29
30
35
40
Mass of Sulstance given to each mouse (mg)
Calculate the lethal dose (LD50) of substance A and B
seperately.
• Which one of the substances is more toxic?
Number of death mice](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0ab55801-b7c0-4d15-bde8-f736015bedbd%2F60efeaf5-727e-4468-90fb-f89dd7fb68b8%2Ftbpza5m_processed.jpeg&w=3840&q=75)
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