हिंदी

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

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

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

संबंधित प्रश्न

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.


Calculate the amount of carbon dioxide that could be produced when 1 mole of carbon is burnt in air.


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Calculate the amount of carbon dioxide that could be produced when 2 moles of carbon are burnt in 16 g of dioxygen.


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).


A solution contains 40 g of common salt in 320 g of water. Calculate the concentration in terms of mass by the mass percentage of the solution.

Explain the term mole fraction.


Why does the molarity of a solution depend upon temperature?


Solve the following problem:

Write the following number in ordinary decimal form:

5.16 × 104


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Write the following number in ordinary decimal form:

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`(1.4xx10^9)/((2.77xx10^3)(3.76xx10^5))`


Solve the following problem:

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

`((9.28xx10^9)(9.9xx10^-7))/((511)(2.98xx10^-6))`


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:

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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?


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\[\ce{H2SO4 + 2NaOH -> Na2SO4 + 2H2O}\]

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Physical quantity Unit
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With increase of temperature, which of these changes?


Molarity is ______.


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