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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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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

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.


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.


Explain the term molality


Why does the molarity of a solution depend upon temperature?


Solve the following problem:

Find out the molar mass of the following compounds:

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(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:

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Solve the following problem:

Write the following number in ordinary decimal form:

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Write the following number in ordinary decimal form:

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Write the following number in ordinary decimal form:

43.71 × 10−4


Solve the following problem:

Write the following number in ordinary decimal form:

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Solve the following problem:

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

`1/(3.40xx10^24)`


Solve the following problem:

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

`33/(9.00xx10^-4)`


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(3.26104) (1.54106)


A 1.000 mL sample of acetone, a common solvent used as a paint remover, was placed in a small bottle whose mass was known to be 38.0015 g.
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The hourly energy requirements of an astronaut can be satisfied by the energy released when 34 grams of sucrose are “burnt” in his body. How many grams of oxygen would be needed to be carried in space capsule to meet his requirement for one day?


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


What is the difference between molality and molarity?


If 4 g of \[\ce{NaOH}\] dissolves in 36 g of \[\ce{H2O}\], calculate the mole fraction of each component in the solution. Also, determine the molarity of solution (specific gravity of solution is 1g mL–1).


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The molarity of urea (molar mass 60 g mol−1) solution by dissolving 15 g of urea in 500 cm3 of water is ______.


Molarity is ______.


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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