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astra-53 [7]
3 years ago
6

Please help me pleaseeeeeeeeeeeeeeeeeeeee

Chemistry
2 answers:
Sliva [168]3 years ago
6 0

Answer:

1. false

2.c. axis

Explanation:

I love science :)

carry on learning

GaryK [48]3 years ago
3 0

Answer:

C. axis...............

You might be interested in
A
romanna [79]

Answer:

I think yes it can be. ( I'm not sure. Sorry )

Explanation:

A plant or animal product is eat other animals that can traded or transported to economic benefit.

7 0
3 years ago
If a 50.0 g piece of glass is heated from 20.0°C to 40.0°C, how many joules of heat are added? The specific heat of glass is 0.5
Andrews [41]

Answer:

500J (joules)

Explanation:

since heat is is the product of mass, change in temperature, and specific heat, the solution can be found from the equation q = mcΔt, heat is 50 * .5 * 20 = 500J

6 0
3 years ago
Considere la siguiente reacción: H, (g) +1, (a) = 2 HI (9). K, para la reacción es 54.3 a 430°C. Si se coloca H, 0.00623M, 0.004
bearhunter [10]

Answer:

[HI] = 0.0255M

[H₂] = 0.00466M

[I₂] = 0.00257M

Explanation:

Para la reacción:

H₂(g) + I₂(g) ⇄ 2HI(g)

La constante de equilibrio, K, se define como:

54.3 = [HI]² / [H₂] [I₂]

Donde cada concentración [] será la concentración en equilibrio para cada especie

Para saber la dirección del equilibrio definiremos Q como:

Q = [HI]² / [H₂] [I₂]

Donde las concentraciones [] serán las concentraciones actuales de cada gas

Reemplazando:

Q = [0.0224M]² / [0.00623M] [0.00414M]

Q = 19.5

Como Q<K, la reacción se desplazará hacia la derecha produciendo más [HI]. Así, las concentraciones en equilibrio serán:

[HI] = 0.0224M +2X

[H₂] = 0.00623M - X

[I₂] = 0.00414 - X

54.3 = [0.0224M +2X]² / [0.00623M - X] [0.00414M - X]

54.3 = 0.00050176 + 0.0896 X + 4 X² / 0.0000257922 - 0.01037 X + X²

0.00140052 - 0.563091 X + 54.3 X² =  0.00050176 + 0.0896 X + 4 X²

0.00089876 - 0.652691 X + 50.3 X² = 0

Resolviendo la ecuación cuadrática:

X = 0.001566M → Solución verdadera

X = 0.01141M → Falsa solución. Produciría concentraciones negativas

Reemplazando:

[HI] = 0.0224M +2*0.001566M

[H₂] = 0.00623M - 0.001566M

[I₂] = 0.00414 - 0.001566M

[HI] = 0.0255M

[H₂] = 0.00466M

[I₂] = 0.00257M

Siendo estas últimas, las concentraciones de las especies luego de alcanzar el equilibrio.

8 0
3 years ago
A solution is prepared by mixing equal volumes of 0.16 M HCl and 0.52 M HNO3. (Assume that volumes are additive.)
slega [8]

Answer:

The pH of the final solution is 0.16 .

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ion concentration in a solution.

pH=-\log[H^+]

Concentration of HCl = 0.16 M

HCl(aq)\rightarrow H^+(aq)+Cl^-(aq)

HCl is a string acid .1 molar of HCl gives 1 molar of of hydrogen ions.

[H^+]=0.16 M

Concentration of HNO_3 = 0.52 M

HNO_3(aq)\rightarrow H^+(aq)+NO_{3}^-(aq)

Nitric is a string acid .1 molar of nitric acid gives 1 molar of of hydrogen ions.

[H^+]'=0.52 M

Total hydrogen ion concentration:

[H^+]''=[H^+]+[H^+]'

=0.16 M+0.52 M=0.68 M

The pH of the solution:

\pH=-\log[H^+]''=-\log[0.68 M]

pH = 0.16

The pH of the final solution is 0.16 .

3 0
4 years ago
A .332 mold sample of gas at a constant pressure and temperature has a volume of 150.0mL. If the volume of the gas is decreased
Vikentia [17]

Answer:

0.111 mol

Explanation:

We can solve this problem by using<em> Avogadro's law</em>, which states that at constant pressure and temperature:

  • V₁n₂=V₂n₁

Where in this case:

  • V₁ = 150.0 mL
  • n₂ = ?
  • V₂ = 50.0 mL
  • n₁ = 0.332 mol

We <u>input the data given by the problem</u>:

  • 150.0 mL * n₂ = 50.0 mL * 0.332 mol

And <u>solve for n₂</u>:

  • n₂ = 0.111 mol
6 0
3 years ago
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