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THNX N SO WE HAVE TO LEARN THE AMOUNT OF HEAT REQUIRED AS IT IS NOT GIVEN IN THE QUESTION
Yes, only for common substances like Water/Ice.
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THNX N SO WE HAVE TO LEARN THE AMOUNT OF HEAT REQUIRED AS IT IS NOT GIVEN IN THE QUESTION
Chemistry doubt
Each tablet contains the same number of moles of CaCO3 and MgCO3. One tablet
reacted with excess hydrochloric acid to produce 0.24 dm3 of carbon dioxide at r.t.p.
CaCO3 + 2HCl → CaCl2 + CO2 + H2O
MgCO3 + 2HCl → MgCl2 + CO2 + H2O
(i) Calculate how many moles of CaCO3 there are in one tablet.
number of moles CO2 = ..............
number of moles of CaCO3 and MgCO3 = ..............
number of moles of CaCO3 = ..............
(ii) Calculate the volume of hydrochloric acid, 1.0 mol /dm3, needed to react with one
tablet.
number of moles of CaCO3 and MgCO3 in one tablet = ..............
Use your answer to (c)(i).
number of moles of HCl needed to react with one tablet = ..............
volume of hydrochloric acid, 1.0 mol /dm3, needed to
react with one tablet
Thanx dude
Thanx alot
Can you please help me out in this question- Physics CIE IGCSE w10 qp 61 question 3 part (c). I am getting the answer as 5.05 ohms but the correct answer is 10 ohms. Can you tell me how to go about this question
Can you please help me out in this question- Physics CIE IGCSE w10 qp 61 question 3 part (c). I am getting the answer as 5.05 ohms but the correct answer is 10 ohms. Can you tell me how to go about this question
Physics Doubt
A radioactive substance has a half-life of 2 weeks. At the beginning of an investigation the
substance emits 3000 β-particles per minute.
How many β-particles will it emit per minute after 6 weeks?
A 0 B 375 C 500 D 1500
Jazak Allah Khair
Physics Doubt
The air in the syringe is at a pressure of 2.0 × 105Pa. The piston is slowly moved into the
syringe, keeping the temperature constant, until the volume of the air is reduced from
80 cm3 to 25 cm3. Calculate the final pressure of the air.
pressure=
thanx bro May God increase your knowledge and succeed you in your path.
Hey Guys Oct/Nov 2013 session is about to start!..... nd im starting to freak out! Please give me helpfull tips for achieving A*-A in IGCSE Physics 0625 (Extended). And paper solving tips and tricks plus does anyone knows a good tutor/tuition for IGCSE Physics in Jubail, Saudi Arabia? May Allah make all the papers easier for us and we all score straight As in all subjects! Ameen.
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