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Murrr4er [49]
3 years ago
12

Which term defines the following: moles of solute mass of solvent in kg?

Chemistry
1 answer:
kramer3 years ago
7 0
The answer is B. molality
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A certain flexible weather balloon contains 3.5 L of helium gas. Initially, the balloon is in WP at 8500ft, where the temperatur
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Answer:

\large \boxed{\text{3.9 L}}

Explanation:

We can use the Combined Gas Laws to solve this problem

\dfrac{p_{1}V_{1} }{T_{1}}  =  \dfrac{p_{2}V_{2}}{T_{2}}

Data

p₁ = 571.2 Torr;  p₂ = 400 Torr

V₁ = 3.5 L;          V₂ = ?

T₁ = 21.5 °C;        T₂ = 6.8 °C

Calculations

(a) Convert the temperatures to kelvins

T₁ = (21.55 + 273.15) K = 294.70 K

T₂ =   (6.8  + 273.15) K = 279.95  K

(b) Calculate the new volume

\begin{array}{rcl}\dfrac{p_{1}V_{1} }{T_{1}} & = & \dfrac{p_{2}V_{2}}{T_{2}}\\\\\dfrac{\text{571.2 Torr $\times$ 3.5 L}}{\text{294.65 K}} & = & \dfrac{\text{400 Torr} \times V_{2}}{\text{279.95 K}}\\\\\text{6.78 L} & = & \text{1.429V}_{2}\\\\V_{2} & = & \textbf{4.7 L}\\\end{array}\\\text{The new volume of the balloon is $\large \boxed{\textbf{4.7 L}}$}

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Which of the following statements about photophosphorylation is FALSE? Energy from oxidation reactions is used to generate ATP f
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Why does the addition of an inert gas to a constant-volume equilibrium mixture of gases not disturb the equilibrium?.
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Some changes to total pressure, like adding an inert gas that is not part of the equilibrium, will change the total pressure but not the partial pressures of the gases in the equilibrium constant expression. Thus, addition of a gas not involved in the equilibrium will not perturb the equilibrium.

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Chlorine would most likely
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