Hello. You did not say what is the experiment to which this question refers, which makes it impossible for it to be answered accurately.
However, advice that should be given to anyone who should start an experiment is: establish a control treatment, provide all treatments with the same variables and the same resources, write down everything that happened in the experiment from implementation to data collection and results, make measurements and analyzes on the same date in all treatments and keep the steaks in the same environment.
Answer: C. <em><u>She should decrease the frequency of the wave</u></em>
<em>Explanation: this makes the waves shorter causing it to become louder the the human ear!</em>
<h3><u><em>hope it helps</em></u></h3>
<h3><u>Answer;</u></h3>
Partial pressure of Ar = 92.934 kPa
<h3><u>Explanation;</u></h3>
Partial pressure of a gas = Mole fraction × Total pressure
Mole fraction = Number of moles of a gas /Total moles of gas
Therefore;
Mole fraction of Ar = 0.211 mol/ (0.211 + 0.150)
= 0.5845
Total pressure = 159 kPa
Hence;
Partial pressure of Ar = 0.5845 × 159 kPa
<u> = 92.934 kPa</u>
Answer:
1.3 atm
Explanation:
Apply the ideal gas law: PV = nRT
Since we need to find the pressure, solve for pressure:
P = nRT / V
Plug in our given values of n = 4.6 moles, R = 0.08206 (ideal gas law constant using atm), T = 325 K, and V = 96.8 L:
P = 4.6(0.08206)(325) / 96.8 = 1.267 atm -> 1.3 atm (two significant figures)
