How many atoms are in 131.97 liters of water vapor at STP?

C2F4 effuses through a barrier at a rate of 4.6x10-6 mol/hour, while an unknown gas effuses at a rate of 5.8x10-6 mol/hour. What

umka21 [38]

The molar mass of the unknown compound is calculated as follows

let the unknown gas be represented by letter Y

Rate of C2F4/ rate of Y = sqrt of molar mass of gas Y/ molar mass of C2F4

= (4.6 x10^-6/ 5.8 x10^-6) = sqrt of Y/ 100

remove the square root sign by squaring in both side

(4.6 x 10^-6 / 5.8 x10^-6)^2 = Y/100

= 0.629 =Y/100

multiply both side by 100

Y= 62.9 is the molar mass of unknown gas

5 0

3 years ago

Two methanol-water mixtures are contained in separate tanks. The first mixture contains 40.0 wt% methanol and the second contain

RoseWind [281]

Answer:

$M_{per}= 52.86$

$W_{per}=47.14$

Explanation:

First mixture:

40 wt% methanol - 60 wt% water 200 kg

$m_{met1}=200 kg * 0.4= 80 kg$

$m_{wat1}=200 kg * 0.6= 120 kg$

Second mixture:

70 wt% methanol - 30 wt% water 150 kg

$m_{met2}=150 kg * 0.7= 105 kg$

$m_{wat2}=150 kg * 0.3= 45 kg$

Final mixture:

$m_{metF=80 kg + 105 kg= 185 kg$

$m_{watF}=120 kg + 45 = 165 kg$

$M_{per}=\frac{185 kg}{185 kg + 165 kg}*100= 52.86$

$W_{per}=\frac{165 kg}{185 kg + 165 kg}*100=47.14$

If, the compositions are constant, the only variables are the mass of each mixture used in the final one, so there can be only one independent balance.

8 0

3 years ago

The half-life of tritium, or hydrogen-3, is 12.32 years. After about 37 years, how much of a sample of tritium will remain uncha

Kipish [7]

I think that the answer is 1/8 Hope this helps!!!! :D

8 0

3 years ago

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The chemical formula for artificial sweetener is C7H5NO3S. How many carbon atoms will be found in 5 molecules of the artificial

irga5000 [103]

35

Because there’s 7 carbon atoms in every molecule of artificial sweetener

And if you have 5 molecules of that

7x5 =35

4 0