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jeka57 [31]
3 years ago
6

Why is it more difficult to breathe at high altitudes rather than low

Chemistry
2 answers:
Dmitrij [34]3 years ago
6 0
As you travel higher, the air begins to thin out which makes it harder for you to breathe. There is less oxygen as you travel higher.
Katena32 [7]3 years ago
5 0
Because the air gets thinner. The air at higher altitudes is more uncontaminated oxygen, cleaner air, whereas at low altitudes, air is more contaminated by smog and pollution from factories, power plants, etc.
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When cooking frozen cheese ravioli, the directions say to put the 255 grams of filled pasta into 3 quarts of boiling water. why
kondaur [170]
<span>When cooking frozen cheese ravioli, you should use three quarts of water instead of one so that the raviolis have room to move around in the boiling water and so that while they are moving around, they will not stick to each other or the pan.</span>
8 0
3 years ago
An electron in a hydrogen atom drops from energy level e3 to e2. what's the frequency of the emitted photon
castortr0y [4]
For this problem we can use 2 equations.
(1) - E = mC²
          E = Energy of photon (J)
          m = Mass of photon (kg) (1.67x10⁻²⁷ kg)
          C = speed of light (3 x 10⁸ m/s)

(2) - E = hf
        E = Energy of photon (J)
        h = plank's constant (6.63 × 10⁻³⁴<span>J s)
        f  = frequency of the photon (Hz)

(1) = (2)
hence, </span>mC² = fh                
                
by rearranging, 
                f =  mC² / h 
                f  =  1.67x10⁻²⁷ kg * (3 x 10⁸ m/s)² / (6.63 × 10⁻³⁴J s)
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3 0
3 years ago
This section of the periodic table is called a(n)
Mice21 [21]

Answer:

Is it <u>Group</u>?

Explanation:

6 0
3 years ago
Read 2 more answers
At 500 degree C, F_2 gas is stable and does not dissociate, but at 840 degree C, some dissociation occurs: F_2 (g) 2 F(g). A fla
bazaltina [42]

Answer:

2.73 is the equilibrium constant for the dissociation of F_2 gas at 840 degree Celsius.

Explanation:

F_2(g)\rightleftharpoons 2F(g)

Initial

0.600 atm    0

Equilibrium

(0.600 atm - p)        2p

Total pressure at equilibrium = P = 0.984 atm

P= 0.600 atm - p)+2p=0.984 atm

p = 0.384 atm

Partial pressure of the F_2 gas , p_{f_2}= (0.600 atm - 0.384 atm)=0.216 atm

Partial pressure of the F gas, p_{f} = 2(0.384 atm)=0.768 atm

K_p=\frac{(p_{F})^2}{p_{F_2}}

K_p=\frac{(0.768 atm)^2}{0.216 atm}=2.73

2.73 is the equilibrium constant for the dissociation of F_2 gas at 840 degree Celsius.

7 0
4 years ago
Covalent bonds are formed when valence electrons are
mamaluj [8]
It’s b. Shared between two atoms.
5 0
3 years ago
Read 2 more answers
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