Answer:
D) she is confident and has already made plans
Answer:
64.0 g/mol.
Explanation:
- Thomas Graham found that, at a constant temperature and pressure the rates of effusion of various gases are inversely proportional to the square root of their masses.
<em>∨ ∝ 1/√M.</em>
where, ∨ is the rate of diffusion of the gas.
M is the molar mass of the gas.
<em>∨₁/∨₂ = √(M₂/M₁)</em>
∨₁ is the rate of effusion of the unknown gas.
∨₂ is the rate of effusion of He gas.
M₁ is the molar mass of the unknown gas.
M₂ is the molar mass of He gas (M₂ = 4.0 g/mol).
<em>∨₁/∨₂ = 0.25.</em>
∵ ∨₁/∨₂ = √(M₂/M₁)
∴ (0.25) =√(4.0 g/mol)/(M₁)
<u><em>By squaring the both sides:</em></u>
∴ (0.25)² = (4.0 g/mol)/(M₁)
∴ M₁ = (4.0 g/mol)/(0.25)² = 64.0 g/mol.
Answer:
n = 1.24 moles
Explanation:
Given that,
Mass = 153 grams
Molar mass of KClO₃ = 122.55 g/mol
We need to find the number of moles.
We know that,
No. of moles = given mass/molar mass
So,
![n=\dfrac{153}{122.55 }\\\\n=1.24](https://tex.z-dn.net/?f=n%3D%5Cdfrac%7B153%7D%7B122.55%20%7D%5C%5C%5C%5Cn%3D1.24)
So, there are 1.24 moles in 153 g of KClO₃.
Answer:
In the health care industry,biological buffers are usually used to maintain the specific pH value. Ensure the stability of drug components: Maintain the pH value of essential components of the drug from being changed or degraded by the gastrointestinal environment, such as aspirin.Buffer management (BM) is a tool that endeavors to balance patient flow in the hospital to nursing home chain of care. Additional research has indicated that the absence of BM is not the result of providers' thinking that BM is unnecessary, unethical or impossible because of unpredictable patient flows.