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3 years ago

AYUDA DOY PUNTOS :( LKDSAFLÑDKMDFÑVDV

Chemistry

1 answer:

Aleksandr-060686 [28]3 years ago

4 0

Answer:

gracias por los puntos que tengas un buen día :)

Explanation:

-ANGIEEE

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A 275-mL flask contains pure helium at a pressure of 752 torr. A second flask with a volume of 475 mL contains pure argon at a p

hichkok12 [17]

Answer:

Partial pressure He = 276 torr

Partial pressure Ar = 457 torr

Total pressure = 733 torr

Explanation:

Assuming temperature remains constant, we can use Boyle's law to solve this problem: P₁V₁=P₂V₂.

Once the two flasks are connected and the stopock opened, the total volume is:

275 + 475 = 750 mL

Now we use Boyle's law twice, to calculate the new pressure of each gas:

He ⇒ 752 torr * 275 mL = P₂He * 750 mL

P₂He = 276 torr

Ar ⇒ 722 torr * 475 mL = P₂Ar * 750 mL

P₂Ar = 457 torr

Finally we calculate the total pressure, adding the partial pressures:

Total pressure = P₂He + P₂Ar = 733 torr

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3 years ago

Can someone please help mee finish this?

zvonat [6]

Answer:

1.Physical. People measure water by themselves.

2.Physical. People chop wood.

Explanation:

(this is all I can answer for you. you have to explain it by yourself tho.)

I dont know if I'm correct so you should double check.

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4 years ago

A laser pulse with wavelength 525 nm contains 4.40 mj of energy. How many photons are in the laser pulse

Alexandra [31]

The laser pulse in this question has a wavelength of $\lambda=524 nm=525\times 10^{-9}m$ . To solve this problem, we first have to calculate the energy of a single photon in the laser pulse. The equation for calculating the energy of a single photon of an electromagnetic wave is $E=\frac{hc}{\lambda}$ where $c$ is the speed of light, $h$ is planks constant and $\lambda$ is the wave length of the photons.

For this problem, $c=3.0\times 10^8m/s$ , $h=6.63\times10^{-34}J.s$ and $\lambda=525\times 10^{-9}m$ . We use these values to calculate the energy of the photon as shown below,

$E=\frac{hc}{\lambda} \\E=\frac{(6.63\times 10^{32}Js)\times(3.0\times10^8m/s)}{525\times 10^{-9}m} \\E=3.79\times 10 ^{-19}J.$

Now that we know the energy for a single photon, we will divide the total energy given by the energy of one photon to get the number of photons in the pulse. The number of photons $n$ is calculated as shown below,

$n=\frac{4.4\times 10^{-3}J}{3.79\times10^{-19}J} =1.16\times 10^{16}$ . There are $1.16\times 10^{16}$ photons.

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3 years ago

Which of the following is not an example of a mineral crystal shape?

alexandr402 [8]

B. Kryptonite. The reason for this is that it is a nonexistent compound, or if it exists it is manmade and only able to survive for a few second. The suffix -tie indicates that is a bonded with oxygen, which, since Krypton is a noble gas, is impossible. also, crystals are formed from ionic bonds, and since both krypton and oxygen are non-metals, a bond between them would be covalent.

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4 years ago

During which movies do spring tides occur???

n200080 [17]

Do you mean moon? If so the answer is full moon and new moon. Just search it up :)

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3 years ago