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2 years ago

Which is the correctly balanced equation for a reaction of aluminium sulfide and zinc?

1 answer:

4 0

The correctly balanced equation for a reaction of aluminium oxide and zinc is as follows: 3Zn + Al2O3 → 2Al +3ZnO

<h3>BALANCING CHEMICAL EQUATION:</h3>

Balancing a chemical reaction means ensuring that the number of atoms of each element on both sides of the equation are equal.

Coefficients are numbers placed in front of the compound/element involved in the reaction. They are used to balance the equation.

According to this question, the balanced chemical reaction that occurs between aluminum oxide and zinc as follows:

3Zn + Al2O3 → 2Al +3ZnO

Learn more about balancing chemical equations at: brainly.com/question/8062886?referrer=searchResults

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Which one of the following reactions is NOT balanced?

Korolek [52]

Answer:

co+ o2+ 2co2 is not balanced reaction

6 0

3 years ago

What is the symbol for an ion with a 3+ charge, 28 electrons, and a mass number of 71

zhenek [66]

Answer:

Ga3+ is a gallium cation

7 0

3 years ago

Data for the decomposition of hydrogen peroxide at some set temperature T is provided below. The rate law depends only on the co

Viktor [21]

Answer:

$0.00442 s^{-1}$ is the value of the rate constant.

Explanation:

$2 H_2O_2\rightarrow 2 H_2O + O_2$

Let the order of the reaction be x.

The rate law of the reaction can be written as:

$R=k[H_2O_2]^x$

1. Rate of the reaction when concentration changes from 0.882 M to 0.697 M in 0 seconds to 60 seconds.

$R=-\frac{0.697 M-0.882 M}{60 s-0 s}=0.00308 M/s$

$0.00308 M/s=k[0.697 M]^x$ ..[1]

2. Rate of the reaction when concentration changes from 0.697 M to 0.566 M in 240 seconds to 360 seconds.

$R=-\frac{0.236M-0.372M}{120s-60 s}=0.00227 M/s$

$0.00218 M/s=k[0.236 M]^x$ ..[2]

[1] ÷ [2]

$\frac{0.00308 M/s}{0.00227 M/s}=\frac{k[0.697 M]^x}{k[0.236M]^x}$

Solving fro x:

x = 0.92 ≈ 1

$R=k[H_2O_2]^1$

$0.00308 M/s=k[0.697 M]^1$

$k=\frac{0.00308 M/s}{[0.697 M]^1}=0.00442 s^{-1}$

$0.00442 s^{-1}$ is the value of the rate constant.

5 0

4 years ago

When 231. mg of a certain molecular compound X are dissolved in 65. g of benzene (CH), the freezing point of the solution is mea

Elan Coil [88]

Answer:

Molar mass X = 18.2 g/mol

Explanation:

Step 1: Data given

Mass of compound X = 231 mg = 0.231 grams

Mass of benzene = 65.0 grams

The freezing point of the solution is measured to be 4.5 °C.

Freezing point of pure benzene = 5.5 °C

The freezing point constant for benzene is 5.12 °C/m

Step 2: Calculate molality

ΔT = i*Kf*m

⇒ΔT = the freezing point depression = 5.5 °C - 4.5 °C = 1.0 °C

⇒i = the Van't hoff factor = 1

⇒Kf = the freezing point depression constant for benzene = 5.12 °C/m

⇒m = the molality = moles X / mass benzene

m = 1.0 / 5.12 °C/m

m = 0.1953 molal

Step 3: Calculate moles X

Moles X = molality * mass benzene

Moles X = 0.1953 molal * 0.065 kg

Moles X = 0.0127 moles

Step 4: Calculate molar mass X

Molar mass X = mass / moles

Molar mass X = 0.231 grams / 0.0127 moles

Molar mass X = 18.2 g/mol

5 0

3 years ago

According to the concept of entropy, what will likely happen to most molecules over time?.

Vsevolod [243]

They're going to fall apart.

<h3>What most molecules will likely experience over time?</h3>

A system's entropy cannot decrease unless heat is being lost from it. This indicates that entropy cannot decrease in a closed system (i.e., nothing enters or leaves, and that means nothing at all), so it must either remain constant or rise. Entropy can decrease, rise, or stay constant in an open system when movement between the system and its surroundings is conceivable. Both of these outcomes leave open the option of a constant state.

Entropy:-

The quantity of atom-alignment combinations that can exist in a system is known as entropy. The quantity of energy that cannot be used for work can also be calculated from an object's entropy.

Learn more about Entropy here:-

brainly.com/question/17241209

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5 0

2 years ago