Hey there !
Molar mass KOH = <span>56.1056 g/mol
1) Number of moles :
n = m / mm
n = 25.4 / </span><span>56.1056
n =0.452 moles
Volume in liters :
985 mL / 1000 => 0.985 L
Therefore:
M = n / V
M = </span>0.452 / 0.985
=> 0.458 M
88 foot per second.
5280 feet = 1 mile
5280 × 60 = 316800
316800 feet per hour
3600 seconds = 1 hour
316800 feet per 3600 seconds
316800 ÷ 3600 = 88
88 feet per second
Answer:
69%
Explanation:
Percent yield = ?
Theoretical yield = 985 grams
Experimental Yield = 680 grams
Percent Yield = Experimental Yield / Theoretical Yield * 100
Percent Yield = 680 / 985 * 1 00
Percent Yield = 0.690 * 100 = 69%
Answer:
S = 1,75x10⁻⁴M
Explanation:
It is possible to answer this question using Henry's law that states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid. The formula is:
S = k×Pi
Where S is solubility, K is Henry's constant and Pi is partial pressure.
At sea level, Pi of O₂ is:
1atm×0,209 = 0,209 atm. Replacing:
2,67x10⁻⁴M = k×0,209atm
k = 1,28x10⁻³M/atm
At 12,000ft Pi of O₂ is:
0,657atm×0,209 = 0,137 atm. Replacing:
S = 1,28x10⁻³M/atm×0,137atm
<em>S = 1,75x10⁻⁴M</em>
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I hope it helps!