STP-তে CH_(4) গ্যাসের 112 cm^(3) ভর হল\n | 12 | স্টোচিওমেট্রি - আমি | রসায়ন | VMC মডু...

The mass of 112 cm^(3) of CH_(4) gas at STP is

0.44g of a monohydric alcohol when added to CH_(3)MgI in ether librates at STP, 112 cm^(3) of methane. With PCC the same alcohol forms a carbonyl compound that answer silver mirror test. The monohydric alcohol is :

D and E are points on the sides AB and AC respectively of Delta ABC . In each of the following cases, determine whetheer DE||BC or not. (i) AD=5.7 cm, DB =9.5 cm, Ae =4.8 cm and EC=8 cm . (ii) AB=11.7 cm, AC =11.2 cm , AD= 6.5cm and AE =41.2 cm , (iii) AB=10.8 cm, AD=6.3 cm, AC=9.6 cm and EC=4 cm . (iv) AD=7.2 cm AE=6.4 cm. AB =12 cm and AC=10 cm .

There is a slab of refractive index n_(2) placed as shown. Medium on two side are n_(1) and n_(3) . Width of slab is d_(2) . An object is placed at distance d_(1) from surface AB and observer is at distance d_(3) from surface CD . Given n_(1)= air [ref. index =1] and n_(2) is glass [ref. index = 3//2 ], d_(1) = 12 cm and d_(2) = 9 cm,d_(3) = 4 cm . If object starts to move with speed of 12 cm//sec towards the slab then find the speed of image as seen by observer [given n_(3)= air =(ref. index =1 )].

An element with density 11.2 g cm^(-3) forms a f. c. c. lattice with edge length of 4xx10^(-8) cm. Calculate the atomic mass of the element. (Given : N_(A)= 6.022xx10^(23) mol^(-1)