What do you mean by significant figures?

One Line Answer

The significant figures in measurement or result are the number of digits known with certainty plus one uncertain digit.

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Chapter 2: Introduction to Analytical Chemistry - Exercises [Page 23]

Chapter 2 Introduction to Analytical Chemistry
Exercises | Q 2. (B) (i) | Page 23

Choose the correct option:

The number of significant figures in 1.50 × 10⁴ g is __________

Why there is a need of rounding off figures during calculation?

Why is accurate measurement crucial in science?

Solve the following question:

Round off the following quantity to two significant figures:

0.00254 m

Solve the following question:

Round off the following quantity to two significant figures:

1.491 × 10⁵ mg

Solve the following question:

Round off the following quantity to two significant figures:

199 g

Solve the following question:

Round off the following quantity to three significant figures:

458 × 10² cm

Solve the following question:

Round off the following quantity to three significant figures:

643 cm²

Solve the following question:

Round off the following quantity to three significant figures:

23,642,000 mm

Solve the following question:

Round off the following quantity to three significant figures:

0.0041962 kg

Solve the following question:

Express the following sum to the appropriate number of significant figures:

319.5 g − 20460 g − 0.0639 g − 45.642 g − 4.173 g