In the sulphur estimation, $0.471 \mathrm{~g}$ of an organic compound gave $1.44 \mathrm{~g}$ of barium sulphate. The percentage of sulphur in the compound is ____________. $\%$
(Nearest integer)
(Atomic Mass of $\mathrm{Ba}=137 \mathrm{u}$ )
Molecular mass of $\mathrm{BaSO}_{4}=233 \mathrm{~g}$.
$\because 233 \mathrm{BaSO}_{4}$ contain $\rightarrow 32 \mathrm{~g}$ sulphur
\therefore 1.44 \mathrm{~g} \mathrm{BaSO}_{4} \text { contain } \rightarrow \frac{32}{233} \times 1.44 \mathrm{~g} \text { sulphur }
given : $0.471 \mathrm{~g}$ of organic compound
$\%$ of $\mathrm{S}=\frac{32 \times 1.44}{233 \times 0.471} \times 100=41.98 \% \approx 42 \%$
OR
$\Rightarrow \mathrm{n}_{\mathrm{s}}=\mathrm{n}_{\mathrm{BaSO}_{4}}=\frac{1.44}{233}$
$\Rightarrow \mathrm{w}_{\mathrm{s}}=\frac{1.44}{233} \times 32 \mathrm{~g}$
therefore $\% \mathrm{~S}=\frac{\mathrm{W}_{\mathrm{s}}}{\mathrm{W}_{\text {O.C. }}} \times 100=\frac{1.44 \times 32}{233 \times 0.471} \times 100$
$=\frac{46.08}{109.743} \times 100=41.98 \simeq 42$
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- JEE Main
- Exam Pattern
- Previous Year Papers
- PYQ Chapterwise
- Physics
- Kinematics 1D
- Kinemetics 2D
- Friction
- Work, Power, Energy
- Centre of Mass and Collision
- Rotational Dynamics
- Gravitation
- Calorimetry
- Elasticity
- Thermal Expansion
- Heat Transfer
- Kinetic Theory of Gases
- Thermodynamics
- Simple Harmonic Motion
- Wave on String
- Sound waves
- Fluid Mechanics
- Electrostatics
- Current Electricity
- Capacitor
- Magnetism and Matter
- Electromagnetic Induction
- Atomic Structure
- Dual Nature of Matter
- Nuclear Physics
- Radioactivity
- Semiconductors
- Communication System
- Error in Measurement & instruments
- Alternating Current
- Electromagnetic Waves
- Wave Optics
- X-Rays
- All Subjects
- Physics
- Motion in a Plane
- Law of Motion
- Work, Energy and Power
- Systems of Particles and Rotational Motion
- Gravitation
- Mechanical Properties of Solids
- Mechanical Properties of Fluids
- Thermal Properties of matter
- Thermodynamics
- Kinetic Theory
- Oscillations
- Waves
- Electric Charge and Fields
- Electrostatic Potential and Capacitance
- Current Electricity
- Thermoelectric Effects of Electric Current
- Heating Effects of Electric Current
- Moving Charges and Magnetism
- Magnetism and Matter
- Electromagnetic Induction
- Alternating Current
- Electromagnetic Wave
- Ray Optics and Optical Instruments
- Wave Optics
- Dual Nature of Radiation and Matter
- Atoms
- Nuclei
- Semiconductor Electronics: Materials, Devices and Simple Circuits.
- Chemical Effects of Electric Current,