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Multiply or divide the following measurements. Be sure each answer you enter contains the correct number of “significant digits!”20.94 mol/L x 46. L= ? mol2.094 g/mL x 0.50 mL = ? g168.3 mol \ 34.5 L = ? mol/L

Multiply or divide the following measurements Be sure each answer you enter contains the correct number of significant digits2094 molL x 46 L mol2094 gmL x 050 class=

Respuesta :

20.94 mol/L x 46. L= ? mol

20.94 x 46.0 = 963.24

We must have the same number of significant digits as the number which has the lowest significant digit.

Now 46.0 has 3 significant digits so the answer will be 963 mol

Answer: 963 mol

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2.094 g/mL x 0.50 mL = 1.047 mL

2.094 has 4 significant digits

0.50 has 2

1.047 should have 2, so we are going to write 1.1 mL

Answer: 1.1 mL

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168.3 mol / 34.5 L = ? mol/L

168.3/34.5 = 4.878

We meed 3 significant digits because 34.5 has 3 and 168.3 has 4. So,

4.878 is approx. 4.88 mol/L

Answer: 4.88 mol/L

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