Calculate the number of molecules of sulphur (S8) present in 16g of solid sulphur

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Ratio of number of moles 1 /1 ∶ 8/ 16  Number of moles = Mass / Atomic mass Number of moles of hydrogen = 1/ 1 = 1  Number of moles of oxygen...

(a) Number of moles of Ca = Given mass of calcium / Molar mass of calcium = 60 / 40 = 1.5 moles  (b) Number of moles = Given number of molecules...

6CO2 + 6 H2 O Chlorophyll /Sunlight → C6 H12 O6 + 6O2  1 mole of glucose needs 6 moles of water  180 g of glucose needs (6×18) g of water  1 g...

At present, _________ Shobo's age = x years His mother's age = 6 times of  Shobo's age = 6x years Five years from now  ________________ Shobo's age = ( x + 5 ) years According to the problem given, x...

It is a covalent solid such as SiO2, diamond, SiC, AlN, etc. Covalent solids (except graphite) have very high melting point and are insulators.

(c) Monoclinic sulphur is stable above 369 K

(c) Atomicity of sulphur in rhombic sulphur is 8

(b) Let Seema’s present age be x years.  Then, Seema’s son’s present age = x/4 years  Seema’s father’s present age = 7x/4 years.  Then, x+ x/4 +7x/4= 32x3  12x = 96 × 4  x = 96...