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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