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77julia77 [94]
3 years ago
8

A weather map indicates that a low-pressure system is approaching a city. Attached to

Chemistry
1 answer:
timofeeve [1]3 years ago
3 0

Answer:

The correct option is;

A warm front is approaching the city and temperatures will increase

Explanation:

A low pressure forms by the movement of air away from a particular spot such that the pressure reduces. The movement of air away from a spot occurs when there is a boundary of warm and cold air such that the air moves to maintain a uniform temperature.

Low pressure centers are associated with warm fronts, resulting in the fall of barometric pressure or observed low pressure and are characterized by a rise in temperature.

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Acetic acid is the active ingredient in vinegar. In a solution of acetic acid the following equilibrium is established. HC2H3O2(
lana [24]

Answer:

the equilibrium constant is 1.8 x 10⁻5 and strongly favor the reactants.

Explanation:

the chemical reaction provided for the two equation are the same but different direction i.e a reversible reaction. Assuming, the mass of reactants and product and temperature remain constant.

therefore, the equilibrium constant K, is 1.8 x 10⁻5. this is a very small value of K, thereby strongly favor the backward direction to form reactant.

6 0
3 years ago
Calculate the energy of one photon of yellow light that has a wavelength of 5.89x10^-7m.​
Viktor [21]

Answer:

E = energy = ? ,

λ = Wavelength = 5.89 × 10^-7 m —> = 589 ×10 ^-9 m ,

h =Planck constant = 6.63 × 10^-34 J.s ,

f = frequency of photo/ electromagnetic radiation = c/λ ,

c = Speed of light in a vacuum = 3 × 10^8 m/s

___o___o____

E = hf \\  \\ E = h \frac{c}{λ}  \\  \\  E = 6.63 \times  {10}^{ - 34}  \frac{3 \times  {10}^{8} }{5.89 \times  {10}^{ - 7} }  \\  \\E =  \frac{6.63 \times  {10}^{ - 34} \times 3 \times  {10}^{8}  }{5.89 \times  {10}^{ - 7} }   \\  \\ E =  \frac{663 \times  {10}^{ - 36} \times 3 \times  {10}^{8}  }{589 \times  {10}^{ - 9} }  \\  \\ E =  \frac{1989 \times  {10}^{ - 28} }{589 \times  {10}^{ - 9} }  \\  \\ E = 3.37691 \times  {10}^{ - 19} J

I hope I helped you^_^

8 0
3 years ago
Please help:
aksik [14]
Oxygen and water!!!!
3 0
3 years ago
HELP!! Suppose that the pressure of 1.00 L of gas is 380 mm Hg when the temperature is 200. K. At what
Korolek [52]
Numa máquina térmica uma parte da energia térmica fornecida ao sistema(Q1) é transformada em trabalho mecânico (τ) e o restante (Q2) é dissipado, perdido para o ambiente.



sendo:

τ: trabalho realizado (J) [Joule]
Q1: energia fornecida (J)
Q2: energia dissipada (J)


temos: τ = Q1 - Q2

O rendimento (η) é a razão do trabalho realizado pela energia fornecida:

η= τ/Q1

Exercícior resolvido:
Uma máquina térmica cíclica recebe 5000 J de calor de uma fonte quente e realiza trabalho de 3500 J. Calcule o rendimento dessa máquina térmica.

solução:

τ=3500 J
Q1=5000J

η= τ/Q1
η= 3500/5000
η= 0,7 ou seja 70%

Energia dissipada será:



τ = Q1 - Q2
Q2 = Q1- τ

Q2=5000-3500
Q2= 1500 J

Exercicio: Qual seria o rendimento se a máquina do exercicio anterior realizasse 4000J de trabalho com a mesma quantidade de calor fornecida ? Quanta energia seria dissipada agora?



obs: Entregar foto da resolução ou o cálculo passo a passo na mensagem
4 0
3 years ago
How many grams are in 1 ounce?
fenix001 [56]
1 ounce = 28.3495 grams 
8 0
3 years ago
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