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sergeinik [125]

3 years ago

12

Determine the number of protons and neutrons in an isotope of bromine (br) with a mass number/atomic mass of 79. (the atomic num

ber of bromine is 35.)

1 answer:

miskamm [114]3 years ago

8 0

44 neutrons and 35 protons. The number of neutrons you have is equal to the atomic mass minus the atomic number.

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The elementary reaction 2H2O(g)↽−−⇀2H2(g)+O2(g) proceeds at a certain temperature until the partial pressures of H2O, H2, and O2

jenyasd209 [6]

Answer:

$1.742\times 10^{-5}$ is the value of the equilibrium constant at this temperature.

Explanation:

$2H_2O\rightleftharpoons 2H_2+O_2$

We are given:

Partial pressure of $H_2O=p^o_{H_2O}=0.0750 atm$

Partial pressure of $H_2=p^o_{H_2}=0.00700 atm$

Partial pressure of $O_2=p^o_{O_2}=0.00200 atm$

The expression of $K_p$ for the given chemical equation is:

$K_p=\frac{p^o_{H_2}^2\times p^o_{O_2}}{p^o_{H_2O}^2}$

Putting values in above equation, we get:

$K_p=\frac{(0.00700 atm)^2\times 0.00200 atm}{(0.0750 atm)^2}\\\\K_p=1.742\times 10^{-5}$

$1.742\times 10^{-5}$ is the value of the equilibrium constant at this temperature.

3 0

4 years ago

If a car speeds up from 80km/hr to 110km/hr to pass another vehicle in 1.5 min (0.025hrs), what is their acceleration?

Xelga [282]

Answer: uhhhh im pretty sure the answer is 69m/hr

Explanation:

8 0

3 years ago

Which property is shared by both acids and bases?

Evgen [1.6K]

$\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}$

3. Conducts electricity in aqueous solution.

Thanks
Hope it helps.

3 0

3 years ago

The function of the cell wall is to

k0ka [10]

Answer:

<u>D.make a plant cell rigid </u>

Explanation:

Cell wall is present only in a plant cell. Option A, B & C are functions of the cell membrane not the cell wall.

$\infty$

6 0

3 years ago

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A family decides to use their bicycles to get to the mall on weekends instead of driving a car. How is the family helping the en

igor_vitrenko [27]

Answer:

They are releasing less carbon dioxide into the air.

Carbon dioxide is what causes global warming and greenhouse gases, etc.

8 0

3 years ago