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ra1l [238]
3 years ago
8

(BRAINLIEST) Which of these statements best describes an Alkali?

Chemistry
1 answer:
Sedbober [7]3 years ago
4 0

Answer:

The number of principle energy level increases and the number of valance electrons remain the same.

Make Me Brainliest.

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Wastewater discharged into a stream by a sugar refinery contains 3.40 g of sucrose (C12H22O11) per liter. A government-industry
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<u>Answer:</u> The pressure that must be applied to the apparatus is 0.239 atm

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To calculate the osmotic pressure, we use the equation for osmotic pressure, which is:

\pi=iMRT

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\pi=i\times \frac{m_{solute}}{M_{solute}\times V_{solution}\text{ (in L)}}}\times RT

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m_{solute} = mass of sucrose = 3.40 g

M_{solute} = molar mass of sucrose = 342.3 g/mol

V_{solution} = Volume of solution = 1 L

R = Gas constant = 0.0821\text{ L atm }mol^{-1}K^{-1}

T = temperature of the solution = 20^oC=[20+273]K=293K

Putting values in above equation, we get:

\pi =1\times \frac{3.40g}{342.3g/mol\times 1}\times 0.0821\text{ L. atm }mol^{-1}K^{-1}\times 293K\\\\\pi =0.239atm

Hence, the pressure that must be applied to the apparatus is 0.239 atm

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Your answer

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