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Vaselesa [24]
3 years ago
7

A weather balloon has a volume of 750ml when filled with helium at 8c at a pressure of 380torr. What is the new volume of the ba

lloon, where the pressure is 0.2torr and the temperature of 75c

Chemistry
2 answers:
Lubov Fominskaja [6]3 years ago
6 0

Explanation:

Below is an attachment containing the solution

DerKrebs [107]3 years ago
3 0

Answer:

Using general gas laws

P1V1/T1 = P2V2/T2

Where P1=380torr = 380mmHg

Vi = 750ml = 0.75dm3

T1= 8c = 281k

P2=0.2torr= 0.2mmHg

T2= 75c = 348k

V2=?

(380*0.75)/281 = (0.2*V2)/348

V2= 1764.77

Explanation:

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5 0
3 years ago
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Copper has two naturally occurring isotopes. Cu−63 has a mass of 62.939 amu and relative abundance of 69.17%.
fiasKO [112]
The answer is 64.907 amu.

The atomic mass of an element is the average of the atomic masses of its isotopes. The relative abundance of isotopes must be taken into consideration, therefore:
atomic mass of copper = atomic mass of isotope 1 * abundance 1 + atomic mass of isotope 2 * abundance 2

We know:
atomic mass of copper = 63.546 amu
The atomic mass of isotope 1 is: 62.939 amu
The abundance of isotope 1 is: 69.17% = 0.6917
The atomic mass of isotope 1 is: x
The abundance of isotope 2: 100% - 69.17% = 30.83% = 0.3083

Thus:
63.546 amu = 62.939 amu * 0.6917 + x * 0.3083
63.546 <span>amu = 43.535 amu + 0.3083x
</span>⇒ 63.546 amu - 43.535 amu = 0.3083x
⇒ 20.011 amu = 0.3083x
   ⇒ x = 20.011 amu ÷ 0.3083 = 64.907 amu
7 0
3 years ago
As the moon orbits the ______________, its gravitational pull is______________ on the side of the earth closest to the _________
Fynjy0 [20]

Answer:

Earth

Strongest

Moon

Gravitational

Tide

Pulls

Bulge

Waves

Proximity

Low Tide

5 0
3 years ago
If you have 60 grams of MgCl2 in 5 liters of solution, what is the molarity of this solution?
AnnyKZ [126]

Answer:

molarity =gram/litre

=60/5

12

6 0
3 years ago
Convert this temperature from F to C<br><br> 26.6°c<br> 93.600<br> 62.2°C<br> 5.7°C
eduard
The answer for this is 26.6°c
3 0
2 years ago
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