Q.5. (a) The following data represents the distribution of electrons, protons and neutrons in atoms of four elements A, B, C, D. Element A Protons 10 B 11 12 C 12 12 D 13 14 Electrons 10 10 11 12 13 Answer the following questions: (i) Write the electronic distribution in atoms of elements A and D. (ii) Element A is an inert gas. why ? (iii) What is the valency of element C? (b) The average atomic mass of a sample of element X is 16.2 u. What are the percentages of isotopes of 16X, and X, respectively?
Answers
Explanation:
There is no such thing as coefficient of viscosity.
Dynamic viscosity of castor oil was measured to be 800 cP at 20°C, 440 cP at 30 °C, and 300 cP at 40 °C. So it has quite high viscosity.
In another source, Scholz and Nogueira (2008) determined density as 950-974 kg.m-3 (at 15 °C), flash point as 229-260 °C, kinematic viscosity as 240-300 mm2.s-1 (at 40 °C), net calorific value as 37.2-39.5 MJ.kg-1, water content as 0.15-0.30 % and iodine number as 82-90 g.Iodine 100.g-1.
Answer:
There is no such thing as coefficient of viscosity.
Dynamic viscosity of castor oil was measured to be 800 cP at 20°C, 440 cP at 30 °C, and 300 cP at 40 °C. So it has quite high viscosity.
In another source, Scholz and Nogueira (2008) determined density as 950-974 kg.m-3 (at 15 °C), flash point as 229-260 °C, kinematic viscosity as 240-300 mm2.s-1 (at 40 °C), net calorific value as 37.2-39.5 MJ.kg-1, water content as 0.15-0.30% and iodine number as 82-90 g.lodine 100.g-1.