Perform the following calculation. Round off your answers to two digits. ( 4 × 10 - 3 ) ( 9 . 9 × 10 - 7 ) ( 789 ) ( 1 . 002 × 10 - 10 ) ( 0 . 3 × 10 2 )

Rounding off means making a number simpler but keeping its value close to what it was. The result is less accurate , but easier to use. Here we have to round off our answer to two digits i.e. rounding to tenths that means to leave one number after the decimal point. ( 4 × 10 - 3 ) ( 9 . 9 × 10 - 7 ) ( 789 ) ( 1 . 002 × 10 - 10 ) ( 0 . 3 × 10 2 ) = 0 . 16697 × 10 – 3 – 7 – ( – 10 ) – 2 = 0 . 16697 × 10 – 2 = 1 . 7 × 10 – 3

Perform the following operation : 3 . 971 × 10 7 + 1 . 98 × 10 4

To perform addition/subtraction operation, first the numbers are written in such a way that they have the same exponent. The coefficients are then added/subtracted. 3 . 971 × 10 7 + 1 . 98 × 10 4 = 3 . 971 × 10 7 + 0 . 00198 × 10 7 = ( 3 . 971 + 0 . 00198 ) × 10 7 = 3 . 97298 × 10 7

E M B I B E

Chemistry>Chapter 2 - Introduction to Analytical Chemistry>Exercises>Q 4

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11th Maharashtra Board

IMPORTANT

Earn 100

Perform the following calculation. Round off your answers to two digits.
$\frac{1}{3.40 \times 10^{24}}$

Important Questions on Introduction to Analytical Chemistry

MEDIUM

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 2 - Introduction to Analytical Chemistry>Exercises>Q 4

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

$\frac{33}{9.00 \times 10^{- 4}}$

MEDIUM

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 2 - Introduction to Analytical Chemistry>Exercises>Q 4

Perform the following calculations. Round off your answers to two digits.
$\frac{1.4 \times 10^{9}}{(2.77 \times 10^{3}) (3.76 \times 10^{5})}$

MEDIUM

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 2 - Introduction to Analytical Chemistry>Exercises>Q 4

Perform the following calculation. Round off your answers to two digits.
$\frac{(4 \times 10^{- 3}) (9.9 \times 10^{- 7})}{(789) (1.002 \times 10^{- 10}) (0.3 \times 10^{2})}$

MEDIUM

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 2 - Introduction to Analytical Chemistry>Exercises>Q 4

Perform the following calculations. Round off your answers to three digits.
$(3.26 \times 10^{4}) (1.54 \times 10^{6})$

MEDIUM

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 2 - Introduction to Analytical Chemistry>Exercises>Q 4

Perform the following calculation. Round off your answers to three digits.
$b . (8.39 \times 10^{7}) (4.53 \times 10^{9})$

MEDIUM

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 2 - Introduction to Analytical Chemistry>Exercises>Q 4

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

$\frac{8.94 \times 10^{6}}{4.35 \times 10^{4}}$

MEDIUM

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 2 - Introduction to Analytical Chemistry>Exercises>Q 4

Perform the following calculation. Round off your answers to three digits.
$\frac{(9.28 \times 10^{9}) (9.9 \times 10^{- 7})}{(511) (2.98 \times 10^{- 6})}$