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S_A_V [24]
2 years ago
3

two different gasohol mixtures are available. one contains 5% alcohol and the other 12% alcohol. How much of each should be mixe

d to obtain 500 gal of gasohol containing 10% alcohol?
Chemistry
1 answer:
otez555 [7]2 years ago
7 0

Answer:

The volumes of two different gasohol mixtures available are 142.86 gal and 357.14 gal

Explanation:

let the two mixtures be x and y respectively

The two mixtures must sum up to 500 gal of gasohol:

x + y = 500 ---------equation 1

The two mixtures must contain 5% alcohol and 12% alcohol  and must be equal to 10% of the total mixture

0.05x + 0.12y = 0.1*500

0.05x + 0.12y = 50 ---------equation 2

from equation (1); y = 500-x

substitute in y into equation 2

0.05x + 0.12(500-x) = 50

0.05x + 60 -0.12x = 50

-0.07x = -10

x = 142.86 gal

y = 500-142.86 = 357.14 gal

Therefore,  the volumes of two different gasohol mixtures available are 142.86 gal and 357.14 gal.

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A vessel contained N2, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial pressures of nitrogen, argon,
xz_007 [3.2K]

Answer:

The partial pressure of neon in the vessel was 239 torr.

Explanation:

In all cases involving gas mixtures, the total gas pressure is related to the partial pressures, that is, the pressures of the individual gaseous components of the mixture. Put simply, the partial pressure of a gas is the pressure it exerts on a mixture of gases.

Dalton's law states that the total pressure of a mixture of gases is equal to the sum of the pressures that each gas would exert if it were alone. Then:

PT= P1 + P2 + P3 + P4…+ Pn

where n is the amount of gases present in the mixture.

In this case:

PT=PN₂ + PAr + PHe + PNe

where:

  • PT= 987 torr
  • PN₂= 44 torr
  • PAr= 486 torr
  • PHe= 218 torr
  • PNe= ?

Replacing:

987 torr= 44 torr + 486 torr + 218 torr + PNe

Solving:

987 torr= 748 torr + PNe

PNe= 987 torr - 748 torr

PNe= 239 torr

<u><em>The partial pressure of neon in the vessel was 239 torr.</em></u>

4 0
2 years ago
Which correctly lists the three methods of heat transfer?
dalvyx [7]
Answer: conduction, convection, radiation

explanation: heats transferred using these three methods and all of them are used in different ways, convection is heat through solids, conduction being used as liquid/gas, radiation being used as electromagnetic waves.

hope this helped!!
7 0
2 years ago
Read 2 more answers
A column is filled with four different liquids of different densities. A red liquid, a blue liquid, a green liquid, and a purple
zhuklara [117]
4. Blue, Red, Green, Purple

(Lowest densities on the top, highest densities on the bottom)
7 0
2 years ago
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A sample of hexane (C6H14) has a mass of 0.580 g. The sample is burned in a bomb calorimeter that has a mass of 1.900 kg and a s
Mama L [17]
Use the formula, Q= mcT

Q= heat
m= mass= 1.900Kg= 1.900 x 10^3 grams
c= specific heat= 3.21 
T= 4.542 K

Q= (1.900 x10^3g)(3.21)(4.542K)= 14.6 Joules.
7 0
2 years ago
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En una determinación cuantitativa se utilizan 17.1 mL de Na2S2O3 0.1N para que reaccione todo el yodo que se encuentra en una mu
lozanna [386]

Answer:

La cantidad de yodo en la muestra es 0.217 g

Explanation:

Los parámetros dados son;

Normalidad de la solución de Na₂S₂O₃ = 0.1 N

Volumen de la solución de Na₂S₂O₃ = 17.1 mL

Masa de muestra = 0.376 g

La ecuación de reacción química se da de la siguiente manera;

I₂ + 2Na₂S₂O₃ → 2 · NaI + Na₂S₄O₆

Por lo tanto, el número de moles de sodio por 1 mol de Na₂S₂O₃ en la reacción = 1 mol

Por lo tanto, la normalidad por mol = 1 M × 1 átomo de Na = 1 N

Por lo tanto, 0.1 N = 0.1 M

El número de moles de Na₂S₂O₃ en 17,1 ml de solución 0,1 M de Na₂S₂O₃ se da de la siguiente manera;

Número de moles de Na₂S₂O₃ = 17.1 / 1000 × 0.1 = 0.00171 moles

Lo que da;

Un mol de yodo, I₂, reacciona con dos moles de Na₂S₂O₃

Por lo tanto;

0,000855 moles de yodo, I₂, reaccionan con 0,00171 moles de Na₂S₂O₃

La masa molar de yodo = 253.8089 g / mol

La masa de yodo en la muestra = 253.8089 × 0.000855 = 0.217 g.

5 0
2 years ago
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