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Perform the following calculation. Round off your answer to three digits. (8.39 107) (4.53 109) - Chemistry

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प्रश्न

Perform the following calculation. Round off your answer to three digits.

(8.39 107) (4.53 109)

संख्यात्मक
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उत्तर

(8.39 107) (4.53 109)

= 38.02069337

= 38.0

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पाठ 2: Introduction to Analytical Chemistry - Exercises [पृष्ठ २५]

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बालभारती Chemistry [English] Standard 11 Maharashtra State Board
पाठ 2 Introduction to Analytical Chemistry
Exercises | Q 4. (Q)(b) | पृष्ठ २५

संबंधित प्रश्‍न

Explain the term Saturated solution giving examples.


A sample of drinking water was found to be severely contaminated with chloroform, CHCl3, supposed to be carcinogenic in nature. The level of contamination was 15 ppm (by mass).

  1. Express this in percent by mass.
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Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040 (assume the density of water to be one).


To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.


Explain the term molality


Solve the following problem:

Find out the molar mass of the following compounds:

Copper sulphate crystal (CuSO4.5H2O)

(At. mass: Cu = 63.5; S = 32; O = 16; H = 1; Na = 23; C = 12; Fe = 56; N = 14)


Solve the following problem:

Find out the molar mass of the following compounds:

Sodium carbonate, decahydrate (Na2CO3.10H2O)

(At. mass: Cu = 63.5; S = 32; O = 16; H = 1; Na = 23; C = 12; Fe = 56; N = 14)


Solve the following problem:

Write the following number in ordinary decimal form:

43.71 × 10−4


Solve the following problem:

Write the following number in ordinary decimal form:

14.3 × 10−2


Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

`33/(9.00xx10^-4)`


Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

`((4xx10^-3)(9.9xx10^-7))/((789)(1.002xx10^-10)(0.3xx10^2))`


Solve the following problem:

Your laboratory partner was given the task of measuring the length of a box (approx 5 in) as accurately as possible, using a metre stick graduated in milimeters. He supplied you with the following measurements:

12.65 cm, 12.6 cm, 12.65 cm, 12.655 cm, 126.55 mm, 12 cm.

State which of the measurements you would accept, giving the reason.


What are the favourable qualities given to gold when it is alloyed with copper or silver for the purpose of making ornaments?


When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the ______ of light by milk and the phenomenon is called ______. This indicates that milk is a ______ solution.


What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL?


If 500 mL of a 5 M solution is diluted to 1500 mL, what will be the molarity of the solution obtained?


What will be the molality of the solution containing 18.25 g of \[\ce{HCl}\] gas in 500 g of water?


An aqueous KCl solution of density 1.20 g mL-1 has a molality of 3.30 mol kg-1. The molarity of the solution in mol L-1 is ______. (Nearest integer)


With increase of temperature, which of these changes?


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(Given: Atomic weights are H, 1u; C, 12u; O, 16u)


The molality of solution containing 15.20 g of urea, (molar mass = 60) dissolved in 150 g or water is ______.


Molarity of liquid HCl will be if the density of the solution is 1.17 g/cc.


Find the molality of solution if boiling point increases by 1.75 K and molal elevation constant of solvent is 5K kg mol-1.


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