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Q1. Who proposed the law of conservation of mass?
Q2. Who amended the original law of law of conservation of mass?
Q3. How metal sodium reacts with a non metal?
Q4. What is the law of constant composition or proportion?
Q5. Give examples of law of constant composition.
Q6. What law is followed in balancing a chemical reaction or transformation?
Q7. Explain the law of conservation of mass with reference to balanced chemical equation.
Q8. Explain the law of conservation of mass diagrammatically
Q9. What is the volume of oxygen required to burn 22.4dm3 of methane and 11.2dm3 of hydrogen at STP?
Q10. Esters give different fruity smell due to presence of which esteric functional groups?
A 65.00 mL sample of HNO3 solution is neutralized by exactly 34.16 mL of 0.5841 M Ba(OH)2. What is the molarity of the HNO3 solution?
Problem- The flask shown here contains 0.761 g of acid and a few drops of phenolphthalein indicator dissolved in water. The buret contains 0.160 M NaOH. Part a) What volume of base is needed to reach the end point of the titration
A 9.780 g. gaseous mixture contains ethane (C2H6) and propane (C3H8). Complete combustion to form carbon dioxide and water requires 1.120 mol of oxygen. Calculate the mass percent of ethane in the original mixture.
Question- For the reaction 3NiO2(s)+2In(s)+3H2O(l)?3Ni(OH)2(s)+In2O3(s) which occurs in basic solution with Eorxn=0.544V, calculate the value of the equilibrium constant, K, for this reaction at 298 Kelvins.
If you fill the larger tank with oxygen to a pressure of 135 atm, to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
a weather balloon at earths surface has a volume of 4 l at 285 k and 791 mmhg. if the balloon is released and the
Ammonium Hydrogen sulfide decomposes on heating, NH4HS(s) NH3 (g)+H2S(g). If Kp for this reaction is .11 at 25 degrees celcius (where partial pressures are measured in atmospheres), what is the total pressure in the flask at equilibrium
Question- A 32.2g iron rod, initially at 22.8 degree C, is submerged into an unknown mass of water at 63.7 degree C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 58.4degree C.
Explain the terms resonance and delocalized electrons. why do we draw resonance structures
use average bond energies to calculate delta hrmrxn for the combustion of methane rmch4
An automobile gasoline tank holds 27kg of gasoline,when the gasoline burns, 85kg of oxygen is consumed, and carbon dioxide and water is produced. What is the total combined mass of carbon dioxide and water?
Iodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom has a mass of 130.906114 amu. Calculate the binding energy
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