To what volume should you dilute 30 mL of a 10.0 M H2SO4 solution to obtain a 0.170 M H2SO4 solution?

A balloon contains 3300 mL of helium gas at 63 °C. What is the final volume, in milliliters, of the gas when the temperature cha

Nesterboy [21]

The final volume : 3.4 L

<h3>Further explanation</h3>

Charles's Law

When the gas pressure is kept constant, the gas volume is proportional to the temperature

$\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}$

V₁=3300 ml

T₁=63 + 273=336 K

T₂=78+273=351 K

the final volume :

$\tt V_2=\dfrac{V_1.T_2}{T_1}\\\\V_2=\dfrac{3300\times 351}{336}\\\\V_2=3447.3~ml\rightarrow 2~sig.~fig.\rightarrow 3.4~L$

8 0

3 years ago

A solution is made by mixing 33.0 ml of ethanol, C2H6O and 67.0 ml of water. Assuming ideal behavior, what is the vapor pressure

ivann1987 [24]

Grams ethanol = 33 ml times .789 gms/ml = 26.037 gms

Moles ethanol = 26.037 gms / 46 gms/mole = .57 moles 

Moles water = 67 ml or 67 grams/18 gms/mole = 3.22 moles 

total moles = .57 + 3.72 = 4.29 moles 

Mole fraction ethanol = .57 moles ethanol / 4.29 moles total = 0.13

Moles fraction water = 3.72 moles water / 4.29 moles total = 0.87

Partial pressure of ethanol = mole fraction ethanol (.13) _ times VP ethanol 43.9 torr) = 5.707 torr 

partial pressure water = mole fraction water .87) times VP water (l7.5 torr) = 15.23 torr 

Total vapor pressure over solution = 5.71 torr + 15.23 torr = 20.94 torr

7 0

3 years ago

Solution A contains 5 molecules of albumin (protein) and solution B contains 12 molecules of glucose. The solutions are separate

Vadim26 [7]

Answer:

C. Water will move from solution A to solution B because glucose is in higher concentration.

Explanation:

In osmosis, the molecules of solvent will pass through a semipermeable membrane from a less concentrated to a more concentrated solution.

Solution B is more concentrated, so the water will move from A to B.

A and D are wrong, because the size of the solute particles does not control the direction of osmosis.

B is wrong because water moves to the more concentrated solution.