Questions and answers by

sanjeet

Questions (6)

why does the flame of a candle always faces upwards though the gravity of earth is pulling everything towards it centre? and
1. 1 answer
2. 393 views
why is earth bulged at the equator?will any one explain me about this?
1. 1 answer
2. 298 views
a steel rod when measured with a zinc scale both being at 25 degree Celsius appear to be one meter long.if the zinc scale is
1. 2 answers
2. 1,291 views
a piece pf ice floats in water.what will happen to the water level when the ice melts completely?
1. 1 answer
2. 681 views
two charges +1.2*10^-8 C and -1.6*10^-8 C are placed at the corners A and B of a right angled triangle ABC in which AB=3cm,
1. 1 answer
2. 926 views
why is dilute nitric acid not used in manufacture of hydrogen sulphide instead of dilute sulphuric acid?
1. 2 answers
2. 512 views

35.6N
8/32=1/4=0.25 moles of oxygen
R^2=G*M*m/F or,R=(G*M*m/F)^1/2
mention not...
heat lost by ice=MLf =22*3.34*10^5 J =7348000 J since heat gained =heat lost 7348000 joules of heat energy is absorbed by the ice box.
x^2-4y=8.............(1) 2x+2y=7 or 2x=7-2y or x=7-2y/2......(2) from 1&2 (7-2y)^2-4y=8 or 49-28y+4y^2-4y=8 or 4y^2-32y=41 4y(y-32)=41 either 4y=41....(a) or y-32=41.....(b) from a y=41/4=10.25 from b y=73 so, y=10.25 or 73
but i am talking about laboratory preparation of hydrogen sulphide gas. it is prepared by treating ferrous sulphide with dilute sulphuric acid.but i want to know what happens when we use nitric acid instead of sulphuric acid.hope u will answer my question.

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