Answer:
1. Helper T cell is one of the T cells that absence results in no immune response.
2. Cytotoxic T cell is also a type of white blood cell that Kills cancer cells and virus infected body cells.
3. Regulatory T cell is a suppressor T cells that slows or stops the immune response.
4. Memory cell is a type of B cell that enables quick and efficient response to secondary exposure to antigen
5. B cell is a cell that forms antibody producing cells
Answer: PCl₃O
Explanation:
1) The chemical formula tells the composition of a compound in terms of the ratio of number of atoms of each element that consitutes such compound.
2) You use the chemical symbol for each kind of atom (element) and subscripts to the right of each symbol to tell the number of atoms of each element.
3) For example, O₂ means two atoms of oxygen. Al₂O₃ means two atoms of aluminum and 3 atoms of oxygen.
4) Therefore, PCl₃O means a ratio 1 : 3 : 1 for phosphorus, chlorine, and oxygen.
Hence, PCl₃O is the chemical formula of your compound.
You are given
200 grams of H2O(s) at an initial temperature of 0°C. you are also given the
final temperature of water after heating at 65°C. You are required to get the
total amount of heat to melt the sample. The specific heat capacity, cp, of
water is 4.186 J/g-°C. Let us say that T1 = 0°C and T2 = 65°C. The equation for
heat, Q, is
Q = m(cp)(T2-T1)
Q = 200g(4.186
J/g-°C )(65°C - 0°C)
<u>Q =
54,418J</u>
Answer:
The neutral atom chlorine (Z=17), for instance has 17 electrons. Therefore, its ground state electronic configuration can be written as 1s 22s 22p 63s 23p 5. The chloride ion (Cl -), on the other hand, has an additional electron for a total of 18 electrons.
