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Tems11 [23]
3 years ago
11

Identify the balanced chemicIdentify the balanced chemical equation that represents a decomposition reaction.

Chemistry
1 answer:
Maru [420]3 years ago
7 0

Answer:

it's the first two

Explanation:

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How many moles of O2 are contained in 32 grams of O2?
Radda [10]

Answer:

2 moles

Explanation:

In one mole of O2 there are 16 grams. So in 2 moles there are 32 grams

7 0
3 years ago
Iron is obtained by reducing iron (III) oxide using the gas carbon monoxide. The reaction is
ivann1987 [24]
A. iron(III) oxide + Carbon-monoxide -> Iron + Carbon-di-oxide.
b.56*2 +16*3
c.Moles=mass(g) / Mr which is 3200/160
d. 2 moles
e.2 moles
f. Moles x Mr = mass so, 20 x 112=2240g
7 0
3 years ago
Considere un elemento "X" que posee como valencias 2, 4 y 6. En su nomenclatura tradicional, considerando la valencia cuatro, es
Ierofanga [76]

Answer:

"ite"

Explanation:

Se sabe que los elementos del grupo 16 de la tabla prioritaria muestran estados de oxidación o valencias de 2,4 y 6 respectivamente, dependiendo del compuesto formado.

Por ejemplo, el azufre forma los siguientes compuestos;

sulfato de sodio (el azufre tiene una valencia de 6)

Sulfito de sodio (el azufre tiene una valencia de 4)

Sulfuro de sodio (el azufre tiene una valencia de 2)

Por lo tanto, en compuestos en los que exhiben una valencia de 4, la terminación común es "ite"

8 0
3 years ago
Read 2 more answers
For which of these is there an increase in entropy? KCI(aq)+AgNO3(aq)KNO3(aq)+AgCI(s) NaCl(s)NaCl(aq) 2NaOH(aq)+CO2(g)Na2CO3(aq)
vovikov84 [41]

Answer: NaCl (s) → NaCl (aq)

Explanation:

Entropy is often associated with the disorder or randomness of a system. Therefore, in each reaction, it is necessary to evaluate if the disorder increases or decreases to understand what happens to the entropy:

1) KCl (aq) + AgNO₃ (aq) → KNO₃ (aq) + AgCl (s) - In this reaction, we have only aqueous reactants in the beginning and in the product we have a precipitate. The solid state is more organised than the liquid, consequently, the entropy decreases.

2) NaCl (s) → NaCl (aq) - In this case, oposite to the first one, we go from a solid state to an aqueous state. The solvation of the ions Na⁺ and Cl⁻ is random while the solid state is very organised. Therefore, in this reaction the entropy increases.

3) 2NaOH (aq) + CO₂ (g) → Na₂CO₃ (aq) + H₂O (l) - In this reaction, the reactants have higher entropy because of the gas CO₂. Therefore, the entropy decreases.

4) C₂H₅OH (g) → C₂H₅OH (l) -  In this reaction, the reactant is a gas and the product a liquid. Therefore, the entropy decreases.

5 0
3 years ago
I need this so badly!
Alla [95]

Answer:

See below

Explanation:

    Use Ideal Gas Law

  PV = n RT          using R = .082057366 l-atm/k-mol

                                           T must be in Kelvin

                         solve for 'n'

  .92 * 1.6  = n  * .082057366 * 287

          n = .0625 moles

then the mole weight:    .0625 * x = .314

                                             x = mole weight = 5.025 gm

"Systems with either very <u>low pressures or high temperatures</u> enable real gases to be estimated as “ideal.”  "

 

4 0
1 year ago
Read 2 more answers
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