Recent content by ph_lover3294

i m sorry ..i didn't understand your answer ..

hi firstly its not a homework question secondly i tried but I am not sure i said that the answer will be (one mole )as Zn +H2SO4---->ZnSO4 + H2 but i don't know is it write or wrong ? thank u

hi zinc reacts with HCl according to the eq Zn + 2HCl ------> ZnCl2 + H2 , delta H= -150 kj * IF SULPHURIC ACID IS USED INSTEAD HCl ..jow many moles of sulphuric acid react with excess amount of zinc so the change in heat content is -150 kj

thank u for your answer but i want to know the answer of the above question please i answered it ... liberated heat=100 x 4.18 x (21.3-18.2)=1295.8 j =1.2958 kj but the answer of the book was ..1295.8 kj so i don't know the right answer thanks

hi for u all i want to ask a question in a thermochemistry about the law of quantity of heat = mass . specefic heat . change in temp firstly . i want to know the units of (mass ) and (heat quantity) in this law (gm , ml , liter)...(joules,kj) Q: on adding 50 ml of diluted base on...

thank u

i know i thought that second answer is the right one as it is opposit in direction but i found different answers in the books so i got confused but also i want to understant ... we want to find the change in velocity so when we give the final one -ve sign we will add them so how...

Homework Statement [SIZE="4"] a tinnes ball of mass 150 gm moves with velocity 11.2 m/s to collide with a racket , after collision it is rebounded with vilocity 7 m/s ...find :-the impulse of the racket on the ball. Homework Equations [SIZE="4"]I = m (delta) v...

hi. im also new here the law is theta (in radian)= length (of the arc)/thr redius theta here : is the central angle ( the measure of the arc) so by this law we can get the redius length and use it in the law f= m*v^2/r to get the centrepital force and from...