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If u , v ,w are non-coplanar vectors and p,q are real numbers, then the equality

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Q. Calculate the number of atoms of hydrogen present in 5.6 g of urea, (NH2 )2 CO

asked Apr 21, 2021 in Chapter 1: Some Basic Concepts of Chemistry by Doubtly (98.9k points)

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M. List the properties of solvents which make them suitable for crystallization

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in a new system of units , the unit of force is 100 N , unit of length is 10 m and unit of time is 100s , unit of mass in this system can be expressed as

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H. Which properties of solvents are useful for solvent extraction?

asked May 30, 2021 in Chapter 3: Basic Analytical Techniques by Doubtly (98.9k points)

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Dimensional analysis of the equation

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Complete combustion of 750 g of an organic compound provides 420 g of CO2 and 210 g of H2O.

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An audio signal υm = 20sin2π(1500t) amplitude modulates a carrier υc =80 sin 2π (100,000t). The value of percent modulation is ________.

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Identify the pair whose dimensions are equal

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The equation of the common tangent to the curves y^2 = 8x and xy = - 1 is

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A plane which bisects the angle between the two given planes 2x – y + 2z – 4 = 0 and x + 2y + 2z – 2 = 0, passes through the point :0

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L. Define a. Solvent extraction b. Distillation.

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b. It takes time for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly

asked May 23, 2021 in Chapter 3: Chemical reactions and equations by anonymous

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a. Atomic radius goes on decreasing while going from left to right in a period.

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D. Why is paper moistened before filtration?

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4. Match the following :

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The system of linear equations x + y + z = 2 , 2x + 3y + 2z = 5 , 2x + 3y + (a2 – 1)z = a + 1

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State Heisenberg uncertainty principle.

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(3) How will you manage the litter during the field visit?

asked May 2, 2021 in Chapter 1: Field Visit by Doubtly (98.9k points)

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I. Why should spotting of mixture be done above the level of mobile phase ?

asked May 30, 2021 in Chapter 3: Basic Analytical Techniques by Doubtly (98.9k points)

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