Answer: the percent composition of carbon in heptane is 83.9%
Explanation:
<u>1) Atomic masses of the atoms:</u>
<u>2) Molar mass of heptane:</u>
- C₇H₁₆: 7 × 12.01 g/mol + 16×1.008 g/mol = 100.2 g/mol
<u>3) Mass of carbon in one mole of heptane:</u>
- C₇: 7 × 12.01 g/mol = 84.07 g/mol
<u>3) Percent composition of carbon:</u>
- % = (mass in grams of C) / (mass in grams of C₇H₁₆) × 100 =
= (84.07 g/ 100.2 g) × 100 = 83.9% ← answer
How could you ensure that all the spectroscopes created the same calibration line and equation?
Answer: You would simply have to take all the spectroscopes reading and ensure that all the helium lines are recorded in regard with the scale along with their colors and wavelengths. All this data should be graphed on a calibration plot and analyzed.
I hope it helps, Regards.
One property that water and oil don’t have are that oils and fats not have any polar part and so for them to dissolve in water they would have to break some of waters hydrogen bonds