Answer:
0.749351061980325 moles (Exact)
0.75 moles (Rounded to the nearest hundredth)
Hope this Helps!
(Sorry if the answer is confusing)
Answer:
The root mean square speed of O2 gas molecules is
<u>519.01 m/s</u>
<u></u>
Explanation:
The root mean square velocity :



Molar mass , M
For He = 4 g/mol
For O2 = 2 x 16 = 32 g/mol
O2 = 32/1000 = 0.032 Kg/mol
First calculate the temperature at which the K.E of He is 4310J/mol
K.E of He =


K.E of He = 4310 J/mol


<u>Now , Use Vrms to calculate the velocity of O2</u>




<span>The answer to this question would be: B.They are different.
A compound will have different characteristics from their element. </span>The interaction of different elements in a compound makes it so. They might have similar or opposite characteristic but it didn't always happen so those answers are not best.
Congress are given a power and decision to ratify the treaties of the foreign policy.
<u>Explanation:</u>
The U.S. Constitution gives a significant part of the international strategy dynamic to the administration, however the congress has a job in approving treaties, and the Supreme Court deciphers arrangements when cases are introduced to it.
Under the Constitution, the President of the United States decides U.S. international strategy. The Secretary of State, selected by the President with the counsel and assent of the congress, is the President's boss remote undertakings guide.
When PH = ㏒(H^+)
[H+] = 10^-3.67
[H+] = 2.14x 10^-4
so according to the reaction equation:
HF ↔ H^+ + F^-
at equilibrium X-(2.14x10^-4) (2.14x10^-4) (2.14x10^-4)
by substitution in Ka formula:
Ka = [H+][F]-/[HF]
6.8x10^-4 = (2.14x10^-4)*(2.14x10^-4) /(X-2.4x10^-4)
X-2.4x10^-4 = (4.58x10^-8)* (6.8x10^-4)
∴X = 2.4x10^-4
∴[HF] = X- (2.14x10^-4)= (2.4x10^-4)-(2.14x10^-4) = 2.6 X 10^-5