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3 years ago

The symbol of Radon??

Chemistry

1 answer:

Alex787 [66]3 years ago

6 0

Answer:

it's rn and the atomic number is 86 if u needed that

Explanation:

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levacccp [35]

Answer:

the time required for one half of a sample of a radioisotope to decay

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2 years ago

if a body is in motion at constant speed in a straight line, what, of any, forces could be acting on it

frez [133]

Downward dog pose..........

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4 years ago

Entalpy of vaporization of water is 41.1k/mol. if the vapor pressure of water at 373k is 101.3 kpa, what is the vapor pressure o

allsm [11]

Answer: The vapor pressure of water at 298 K is 3.565kPa.

Explanation:

The vapor pressure is determined by Clausius Clapeyron equation:

$ln(\frac{P_2}{P_1})=\frac{\Delta H_{vap}}{R}(\frac{1}{T_1}-\frac{1}{T_2})$

where,

$P_1$ = initial pressure at 298 K = ?

$P_2$ = final pressure at 373 K = 101.3 kPa

$\Delta H_{vap}$ = enthalpy of vaporisation = 41.1 kJ/mol = 41100 J/mol

R = gas constant = 8.314 J/mole.K

$T_1$ = initial temperature = 298 K

$T_2$ = final temperature = 373 K

Now put all the given values in this formula, we get

$\log (\frac{101.3}{P_1})=\frac{41100}{2.303\times 8.314J/mole.K}[\frac{1}{298K}-\frac{1}{373K}]$

$\frac{101.3}{P_1}=antilog(1.448)$

$P_1=3.565kPa$

Therefore, the vapor pressure of water at 298 K is 3.565kPa.

3 0

4 years ago

What class of organic product results when 1-heptyne is treated with a mixture of mercuric acetate (HgSO4) in aqueous sulfuric a

Alekssandra [29.7K]

Answer:

heptan-2-one

Explanation:

In this case, the final product would be a ketone: heptan-2-one. To understand why this molecule is produced we have to check the reaction mechanism.

The first step is the protonation of the triple bond to produce the more stable carbocation (a secondary one) by the action of sulfuric acid $H_2SO_4$ . The next step is the attack of water to the carbocation to produce a new bond between C and the O, producing a positive charge in the oxygen. Then, a deprotonation step takes place to produce an enol. Finally, we will have a rearrangement (keto-enol tautomerism) to produce the final ketone.

See figure 1

I hope it helps!

7 0

3 years ago

10. Hydrogen and sulfur combine to make hydrogen sulfide.

Genrish500 [490]

Answer:

H₂S

Explanation:

8 0

4 years ago