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How many significant figures are present in the 208?

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प्रश्न

How many significant figures are present in the 208?

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उत्तर

208 - There are 3 significant figures.

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

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

व्हिडिओ 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?

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 mean diameter of a thin brass rod is to be measured by vernier callipers. Why is a set of 100 measurements of the diameter expected to yield a more reliable estimate than a set of 5 measurements only?


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?

State the number of significant figures in the following:

0.007 m2


State the number of significant figures in the following:

2.64 × 1024 kg


State the number of significant figures in the following: 

6.032 N m–2


A large ball 2 m in radius is made up of a rope of square cross-section with edge length 4 mm. Neglecting the air gaps in the ball, what is the total length of the rope to the nearest order of magnitude?


Solve the numerical example.

Write down the number of significant figures in the following: 0.003 m2, 0.1250 gm cm-2, 6.4 x 106 m, 1.6 x 10-19 C, 9.1 x 10-31 kg.


Answer the following question.

Describe what is meant by order of magnitude.


Taking into account of the significant figures, what is the value of 9.99 m – 0.0099 m?


If the density of a solution is 3.12 g mL–1, the mass of 1.5 mL solution in significant figures is ______.


Using the rules for significant figures, the correct answer for the expression `(0.02858 xx 0.112)/(0.5702)` will be ______.


Significant figures in a measurement include which of the following?


The radius of Earth is written as 0.64 × 10⁷ m in scientific notation. What is its order of magnitude?


Which of the following numbers has 4 significant figures?


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