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3 years ago

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Deuterium on a periodic table?

1 answer:

Virty [35]3 years ago

5 0

<span>Deuterium itself is not on the periodic table, but it is known as a heavy hydrogen which is on the table. The nucleus of deuterium is called deuteron and has a neutron in it while most commonly protium has no neutrons in its nucleus. Deuterium is one of two different stable isotopes of hydrogen. I'm not entirely sure on what answer you needed, but I hope this helped:)

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What does a chemist do

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What is true about energy in an ordinary chemical reaction? Energy is

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In yeast, ethanol is produced from glucose under anaerobic conditions. A cell‑free yeast extract is placed in a solution that co

12345 [234]

Answer:

650 mmol.

Explanation:

The equation for the fermentation of one mole of glucose is:

C₆H₁₂O₆ + 2 NAD⁺ + 2 ADP + 2 P i + 2 NADH → 2 EtOH + 2 ATP + 2 NADH + 2 NAD⁺

Since NAD⁺/NADH is used and regenerated, we can eliminate it from the equation:

C₆H₁₂O₆ + 2 ADP + 2 P i → 2 EtOH + 2 ATP

With the equation, we calculate the maximum amount of ethanol that could be obtained theoretically:

1000 mmol C₆H₁₂O₆ ------------ 2000 mmol EtOH

325 mmol C₆H₁₂O₆ ------------- x= 650 mmol EtOH

Therefore, the maximum amount of ethanol that could be produced is 650 mmol.

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3 years ago

Determine the molality of a solution of benzene dissolved in toluene (methylbenzene) for which the mole fraction of benzene is 0

kogti [31]

Answer:

2.32 m

Explanation:

So, according to definition of mole fraction:

$Mole\ fraction\ of\ benzene=\frac {n_{benzene}}{n_{benzene}+n_{toluene}}$

Mole fraction = 0.176

Applying values as:

$0.176=\frac {n_{benzene}}{n_{benzene}+n_{toluene}}$

$0.176\times ({n_{benzene}+n_{toluene}})={n_{benzene}}$

So,

$0.176\times n_{toluene}}=0.824\times {n_{benzene}}$

${n_{benzene}}=\frac {0.176}{0.824}\times n_{toluene}}$

${n_{benzene}}=0.2136\times n_{toluene}}$

Also, Molar mass of toluene = 92.14 g/mol

Thus,

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

$Mass=92.14\times n_{toluene}}\ g$

Also, 1 g = 0.001 kg

So,

$Mass\ of\ toluene=0.09214\times n_{toluene}}\ kg$

Molality is defined as the moles of the solute present in 1 kg of the solvent.

It is represented by 'm'.

Thus,

$Molality\ (m)=\frac {0.2136\times n_{toluene}}{0.09214\times n_{toluene}}$

<u>Molality of benzene = 2.32 m</u>

3 0

3 years ago