Q1: 60 gram CS2 is combusted by 80 gram O2 through the following reaction:
CS2+ 3O2 ——–> CO2 + 2SO2
find (a) Limiting Reactant (b) Volume of S02 produced at STP
Q2: 3 moles of CeH6 are reacted with 11 moles of Oxygen gas. Find out of (a) moles of CO2 produced (b) Mass of water produced at STP.
C6H6 + 7.5O2——–> 6CO2 + 3H20
Q3: 100 gram of KCIO3 is decomposed, find the volume of KCl produced at 300K and 1000 torr.
2KCIO3 ——–> 2KCI + 3O2 (K=39, CI-35.5, 0=16, S=32, C=12)
Q4: Solve the following using exponential notation:
(i) 32600 + 6420 + 5423
(ii) 2.33×104 -12335
Q5: Simplify according to the rules of significant figures:
187 x 25
(4.9 – 0.22)
(ii) 30.5cm + 41cm + 0.013m
Q6: A hydrocarbon has 20% hydrogen and 80% carbon. Find the empirical and molecular formulae of the compound, if the molecular mass is 30.
Q7: Find the mass, number of moles, molecules and volume of C02 at STP, obtained by burning 0.010 Kg of carbon. Give also the equation.
396 x 41 2
|Q8:||Find the value of following by the help of using Logarithm||396 x 41.2|
Q9: Caffeine has the following %age composition:
Carbon 49.48%, Hydrogen 5.19%, Oxygen 16.48% and Nitrogen 28.85%. Its molecular weight is 194 gram/mole. Find its molecular formula (N=14)
Q10: The density of Phosphene Gas is 1.26gram/ltr at 50oC and 747mm Hg. Assume that Phosphene behaves ideally, calculate its molecular mass.