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Number of protons, neutrons and electrons in the element 231/89 y is: (1) 89, 231, 89 (2) 89, 89, 242 (3) 89, 142, 89 (4) 89, 71, 89 Ans: 89, 142, 89
Conditions which a dye must satisfy and describe them
Gold has a molar mass of 197g/mol. How many atoms are in the sample?Please give me procedure also. Ans) molecular wieght of gold is 197 g 1mole/g of molecule is occupies the
If there is a fire accident in an industry, what a safety enginner will do? Ans) Fire engineering is the application of engineering and science principles to protect prope
Q. Explain Boyles law with volume and pressure graph? Ans. Boyle's law demonstrates the relationship between the volume (V) and pressure (P) of a gas. This law shows that th
how carbon tetra-valency lead to stability?
How to find stability of carbocations in benzene ring..??? How to find optically inactive isomers ??? (say of--C2H5Cl) How to find the weakest C-X (carbon-halogen bond in a benz
Calculate the force constant of CF4 and SiF4 and compare their relative strengths with each other. The heats of formation of CF 4 and SiF 4 are -1222 kJmol -1 and -1615
type of electrode?
Disinfectants: The chemical substances that are employed to kill microorganisms although they cannot be applied on living tissues are known as disinfectants. Hence, disinfectan
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