The mass of three samples are 0.12 g, 1.8 g and 0.562 g. (given)
During addition (mathematical operation) of significant figures following rules are followed:
1. The number of significant figures are counted.
2. Addition is done.
3. Round the answer to the least number of decimal places.
Following the above rules, the addition of mass of the three samples is as follows:
Hence, is the combined mass of all the three samples.
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The statement "<span>A measurement of 8,452 meters has a lower margin of error than a measurement of 84.52 meters." is true. </span>
Answer:
78.15 g
Explanation:
Number of moles of C₇H₆O₃ that reacted = mass/molar mass = 57.6g/126 gmol-1
Number of moles of C₇H₆O₃ = 0.457 moles of C₇H₆O₃
From the reaction equation;
1 mole of C₇H₆O₃ yields one mole of aspirin
0.457 moles of C₇H₆O₃ yields C₇H₆O₃ of aspirin
Hence theoretical yield of aspirin = 0.457 moles × 180 gmol-1 = 82.26g of aspirin
% yield = actual yield/theoretical yield ×100
Actual yield= % yield × theoretical yield/100
Actual yield = 95.0 × 82.26/100
Actual yield = 78.15 g
Answer:
Option C. $1.79
Explanation:
From the question, were told that the total cost of 8 protein bar is $14.32.
Therefore, the cost of 1 protein bar will be = $14.32/8 = $1.79