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How many significant figures are present in the 0.0025? - Chemistry

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प्रश्न

How many significant figures are present in the 0.0025?

एक पंक्ति में उत्तर

उत्तर

0.0025 - There are 2 significant figures.

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अध्याय 1: Some Basic Concepts of Chemistry - EXERCISES [पृष्ठ २६]

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एनसीईआरटी Chemistry - Part 1 and 2 [English] Class 11
अध्याय 1 Some Basic Concepts of Chemistry
EXERCISES | Q 1.19 - (i) | पृष्ठ २६

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

Round up the following upto three significant figures:

0.04597


Round up the following upto three significant figures:

2808


How many significant figures should be present in the answer of the following calculation?

5 × 5.364


How many significant figures should be present in the answer of the following calculation?

0.0125 + 0.7864 + 0.0215


A student measures the thickness of a human hair by looking at it through a microscope of magnification 100. He makes 20 observations and finds that the average width of the hair in the field of view of the microscope is 3.5 mm. What is the estimate on the thickness of hair?


The mass of a box measured by a grocer’s balance is 2.300 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is

  1. What is the total mass of the box?
  2. What is the difference in the masses of the pieces to correct significant figures?

Precise measurements of physical quantities are a need of science. For example, to ascertain the speed of an aircraft, one must have an accurate method to find its positions at closely separated instants of time. This was the actual motivation behind the discovery of radar in World War II. Think of different examples in modern science where precise measurements of length, time, mass etc. are needed. Also, wherever you can, give a quantitative idea of the precision needed.


It is a well known fact that during a total solar eclipse the disk of the moon almost completely covers the disk of the Sun. From this fact and from the information you can gather from examples 2.3 and 2.4, determine the approximate diameter of the moon.


State the number of significant figures in the following:

0.2370 g cm–3


Solve the numerical example.

The diameter of a sphere is 2.14 cm. Calculate the volume of the sphere to the correct number of significant figures.


Answer the following question.

Describe what is meant by order of magnitude.


Which of the following has the highest number of significant figures?


Write the rules for determining significant figures.


The mass and volume of a body are 4.237 g and 2.5 cm3, respectively. The density of the material of the body in correct significant figures is ______.


The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet in appropriate significant figures and error is ______.


Why do we have different units for the same physical quantity?


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