3. Round 87.073 meters to three significant figures. Write your answer in scientific notation. Step 1: 87.073 rounds to _______
2 answers:
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Answer: The percentages of carbon and hydrogen numerically to four significant figures is and
respectively.
Explanation:
Molar mass of the compound is the mass of 1 mole of compound which is the sum of masses of each element.
Mass of 1 mole of compound= mass of carbon + mass of hydrogen+ = 5(12) + 12(1)= 72 g.
a) Percentage by mass of carbon =
Percentage by mass of carbon =
b) Percentage by mass of hydrogen =
Percentage by mass of hydrogen =
Answer:
Explanation:
Hello,
In this case, we are asked to compute the by mass percent for the given 3.2 g of ethylene glycol in 43.5 g of water. In such a way, since the by mass percent is computed as follows:
Whereas the solute is the ethylene glycol and the solvent the water, therefore we obtain:
Best regards.