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3 years ago

Water is moving across a membrane from solution a into solution

Chemistry

1 answer:

leva [86]3 years ago

7 0

The answer is solution a must have a lower solute concentration than solution b.

That is when water is moving across a membrane from solution a into solution b, then solution a must have a lower solute concentration than solution b.

When solution a have a lower solute concentration than solution b, then water moves across a membrane from solution a into solution b.

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A student performs a reaction that makes aluminum oxide. According to her calculations, she should expect to make 115.2 grams. S

tiny-mole [99]

Answer:

The percentage of the student is 58.17%.

Explanation:

Expected yield of aluminum oxide = 115.2 g

Actual yield of aluminum oxide produced =66.9 g

The percentage yield is calculated by dividing actual yield by expected yield and then multiplying it with hundred.

Percentage yield:

$\frac{\text{Actual yield}}{\text{Expected yield}}\times 100$

$\% Yield=\frac{66.9 g}{115.2 g}\times 100=58.17\%$

The percentage of the student is 58.17%.

7 0

3 years ago

0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20°C. The gas then undergoes heating at constant volume to

dolphi86 [110]

<u>Answer:</u> The final pressure of the gas is 9.41 atm

<u>Explanation:</u>

To calculate the pressure of the gas, we use the equation given by ideal gas equation:

$PV=nRT$

where,

P = pressure of the gas = ?

V = Volume of gas = $50cm^3=0.05L$ (Conversion factor: $1L=1000cm^3$ )

n = Number of moles = 0.01 mol

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

T = temperature of the gas = $300^oC=[300+273]K=573K$

Putting values in above equation, we get:

$P\times 0.050L=0.01\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 573K\\\\P=\frac{0.01\times 0.0821\times 573}{0.05}=9.41atm$

Hence, the final pressure of the gas is 9.41 atm

5 0

3 years ago

According to the VSEPR theory, a molecule or ion of NH₃ will have a _____ shape.

Elan Coil [88]

Answer:

B) flat trigonal

Explanation:

All the Hydrogen atoms are arranged symmetrically around the Nitrogen atom which forms the base, and the two nonbonding electrons form the tip

4 0

2 years ago

Read 2 more answers

Perform the following

irinina [24]

Answer:

12.0778

Explanation:

7 0

3 years ago

What is the molecular formula of a compound that is composed of 94.1% O and 5.9% H with a molar mass of 34g

elena-s [515]

Answer:

B. 67.6/Hg(200.5)= .337. 10.8/S(32.1)= .336. 21.6/O(16)= 1.35--> .337/.336= 1 .336/.336= 1 1.35/.336= 4. Formula= HgSO4

Explanation:

3 0

3 years ago