Answer: 1%
Explanation:
"According to the Environmental Protection Agency, each additional 100 pounds on a vehicle can reduce its fuel efficiency by 1%. Carrying open cargo (i.e., on flatbeds) is also less fuel-efficient than carrying cargo inside a closed truck."
Answer: The system’s host star, called TRAPPIST-1, is what is known as an ultracool dwarf.
Explanation:
Also called 2MASS J23062928-0502285, TRAPPIST-1 is an ultracool dwarf star that hosts three planets: TRAPPIST-1b, c, and d.
Never before planets had been found around ultracool dwarf stars, and they are considered as potentially habitable and, therefore, suitable for life outside our solar system.
You're starting with
(12.0 mL) (0.550 M) = (0.0120 L) (0.550 M) = 0.00660 mol
of FeCl₃.
For every mole of FeCl₃ in the balanced reaction, you need 3 moles of NH₄OH, so you need a minimum 0.0198 mol NH₄OH per mole FeCl₃.
Then the requisite volume of NH₄OH solution needed is <em>V</em> such that
(0.0198 mol) / <em>V</em> = 0.200 M
Solve for <em>V</em> to get
<em>V</em> = (0.0198 mol) / (0.200 M) = 0.0990 L = 99 mL
