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KatRina [158]
3 years ago
15

Select each process that produces an increase in the entropy of the system: check all that apply. check all that apply. cao(s) +

co2(g) → caco3(s) hcl(g) + nh3(g) → nh4cl(s) co2(s) → co2(g) 2 so2(g) + o2(g) → 2 so3(g)
Chemistry
1 answer:
skelet666 [1.2K]3 years ago
5 0
2SO2(g)+O2(g)→2 SO3(g), here reaction entropy decreases as the number of gas moles decreases from reactions to products.
HCL(g)+NH3(g)→NH4CL(s), entropy decreases as molecules of gas are converted into solid.
CO2(s)→CO2(g), entropy increases as gas is formed from a solid.
Cao(s)+CO2(g)→Caco3(s), entropy increases as gas is converted into a solid.
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5 0
3 years ago
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Complete the equation determine if there are precipitates write the balanced ionic and net ionic equations. If there is no preci
alukav5142 [94]

You may find bellow the balanced chemical equations.

Explanation:

Molecular equations:

3 Sr(NO₃)₂ (aq) + 2 K₃PO₄ (aq) → Sr₃(PO₄)₂ (s) + 6 KNO₃ (aq)

2 NaOH (aq) + Ni(NO₃)₂ (aq) = Ni(OH)₂ (s) + 2 NaNO₃ (aq)

Ionic equations:

3 Sr²⁺ (aq) + 6 NO₃⁻ (aq) + 6 K⁺ (aq) + 2 PO₄³⁻ (aq) →  Sr₃(PO₄)₂ (s) + 6 K⁺ (aq) + 6 NO₃⁻ (aq)

2 Na⁺ (aq) + 2 OH⁻ (aq) + Ni²⁺ (aq) + 2 NO₃⁻ (aq) = Ni(OH)₂ (s) + 2 Na⁺ (aq) + 2 NO₃⁻ (aq)

To get the net ionic equation we remove the spectator ions:

3 Sr²⁺ (aq) + 2 PO₄³⁻ (aq) →  Sr₃(PO₄)₂ (s)

2 OH⁻ (aq) + Ni²⁺ (aq) = Ni(OH)₂ (s)

Learn more about:

net ionic equations

brainly.com/question/7018960

#learnwithBrainly

4 0
3 years ago
What volume would 7.83 X 10^3 moles of Nitrogen gas occupy?
Kay [80]

Answer:

29.232 l

Explanation:

6.023x10^23 mole of nitrogen =22.4 l

7.83×10^23 mole of nitrogen =

22.4/(6.023×10^23)×7.83×10^23

=29.232 l

4 0
3 years ago
David says, "Pure honey has nothing else added." Susan says ,"The honey is not really pure. It is mixture of many subsatnces . W
Olenka [21]
Really, both David and Susan are right; they were using the term "pure" in different ways. David likely meant "pure honey" in the sense that the honey was not altered or had any additives. Susan used pure as in a "pure substance" in chemistry. Susan is also right, because honey is a medley of carbohydrates, proteins, amino acids, and vitamins and minerals. Chemically, honey is not a pure substance- it's a mixture.
8 0
3 years ago
Para saber si se lleva a cabo una reacción donde un metal desplaza a otro metal de su sal u otro compuesto, es preciso:
olga_2 [115]

Answer:

Explanation:

¡Hola!

En este caso, dado que las reacciones de desplazamiento simple se llevan a cabo cuando un metal desplaza a otro metal de su sal u otro compuesto, es preciso tener en cuenta la serie de reactividad de los metales que se muestra en el archivo adjunto.

Así, es mandatorio que el metal con el que la sal original reacciona, sea más reactivo que el catión de la misma, de modo contrario, la reacción tendría lugar. Por ejemplo, si el sodio reacciona con cloruro de zinc, al este primero estar más arriba en la serie, quiere decir que es capaz de desplazar el zinc en el cloruro original y así se formaría zinc metálico y cloruro de sodio.

¡Saludos!

4 0
3 years ago
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