Express the following sum to appropriate number of significant figures : a. $2.3 \times 10^3$ mL + $4.22 \times 10^4$ mL + $9.04 \times 10^3$ mL + $8.71 \times 10^5$ mL b. 319.5 g - 20460 g - 0.0639 g - 45.642 g - 4.173 g

Express the following sum to appropriate number of significant figures : a. 2.3 × 10³ mL + 4.22 × 10⁴ mL + 9.0

Solve the following questions · Q27

2.3 \times 10^3

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a. Rewrite every term at exponent $10^5$ : $2.3\times10^3 = 0.023\times10^5$ ; $4.22\times10^4 = 0.422\times10^5$ ; $9.04\times10^3 = 0.0904\times10^5$ ; $8.71\times10^5$ stays as is. Sum $= (0.023+0.422+0.0904+8.71)\times10^5 = 9.2454\times10^5$ . The least precise term, $8.71\times10^5$ , is known only to 2 decimal places at this scale (3 significant figures), so the sum is rounded to match: $9.25 \times 10^5$ mL. …

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Q.Express the following sum to appropriate number of significant figures : a. $2.3 \times 10^3$ mL + $4.22 \times 10^4$ mL + $9.04 \times 10^3$ mL + $8.71 \times 10^5$ mL b. 319.5 g - 20460 g - 0.0639 g - 45.642 g - 4.173 g

Concept understanding — Rounding Off and Calculations with Significant Figures

Q.Express the following sum to appropriate number of significant figures : a. 2.3×1032.3 \times 10^32.3×103 mL + 4.22×1044.22 \times 10^44.22×104 mL + 9.04×1039.04 \times 10^39.04×103 mL + 8.71×1058.71 \times 10^58.71×105 mL b. 319.5 g - 20460 g - 0.0639 g - 45.642 g - 4.173 g

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Q.Express the following sum to appropriate number of significant figures : a. $2.3 \times 10^3$ mL + $4.22 \times 10^4$ mL + $9.04 \times 10^3$ mL + $8.71 \times 10^5$ mL b. 319.5 g - 20460 g - 0.0639 g - 45.642 g - 4.173 g

Unlock everything free for 14 days