Answer:
0 m/s
Explanation:
An object at rest stays at rest unless acted upon therefore it can only be 0.
To determine what gas is this, we use Graham's Law of Effusion where it relates the rates of effusion of gases and their molar masses. We do as follows:
r1/r2 = √(M2 / M1)
Let 1 be the the unkown gas and 2 the H2 gas.
r1/r2 = 0.225
M2 = 2.02 g/mol
0.225 = √(2.02 / M1)
M1 = 39.90 g/mol
From the periodic table of elements, most likely, the gas is argon.
When,
[OH⁻] = 1.4 × 10⁻³
Then,
pOH = -log (1.4 × 10⁻³)
pOH = 2.85
Also,
pH + pOH = 14
So,
pH = 14 - 2.85
pH = 11.15
As pH is greater than 7, so the solution is Basic in Nature.
Calculating for concentration of [H⁺],
As,
pH = -log [H⁺]
Or,
11.15 = -log [H⁺]
Taking Antilog on both sides,
[H⁺] = 7.07 × 10⁻¹² M
Result:
A solution with a hydroxide ion concentration of 4.15 × 10⁻³<span> M is Basic and has a hydrogen ion concentration of </span><u>7.07 × 10⁻¹² M.</u>
