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____ [38]
3 years ago
7

Which of these scenarios involve a reaction that is at equilibrium?

Chemistry
2 answers:
inessss [21]3 years ago
7 0
The amount of products and reactants is constant.
egoroff_w [7]3 years ago
7 0

Answer:

C

Explanation:

I just took the quizz

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When iron reacts with oxygen, it forms iron oxide, or rust.
Feliz [49]

Answer:

Mass of iron oxide: 79.85 g  

Explanation:

Given data:

Mass of iron = 112 g

Mass of O₂ = 24 g

Mass of iron oxide formed = ?

Solution:

4Fe + 3O₂         →       2Fe₂O₃

Number of moles of Fe:

Number of moles = mass/ molar mass

Number of moles = 112 g/ 55.85 g/mol

Number of moles =  2 mol

Number of moles of O₂:

Number of moles = mass/ molar mass

Number of moles = 24 g/ 32 g/mol

Number of moles =  0.75 mol

Now we will compare the moles of oxygen and iron with iron oxide.

                 Fe           :             Fe₂O₃

                 4             :                2

                 2             :                2/4×2 =  1

                O₂            :             Fe₂O₃

                 3             :                2

                 0.75       :                2/3×0.75 =  0.5

The number of moles of iron oxide formed by oxygen are less thus it will be limiting reactant.

Mass of iron oxide:

Mass = number of moles × molar mass

Mass = 0.5 mol  × 159.69 g/mol

Mass = 79.85 g  

3 0
3 years ago
What pH must organisms maintain
MA_775_DIABLO [31]
6.5-7.5 i believe was right
5 0
2 years ago
Read 2 more answers
Match each SI unit to the quantity it measures mass temperature time electric current
kherson [118]

<u>The S.I unit for the given term:</u>

Mass is expressed in kilogram (kg)

temperature is expressed in kelvin (K)

Time is expressed in seconds (s)

Current is expressed in ampere (A)

<u>Explanation:</u>

<u>Current: </u>

The current can be defined as the electric charge flow in the surface (means ratio of charge per unit time). It is measured in ampere (A)

             Current\ I=\frac{\text { charge }}{\text { time }}

<u>Temperature: </u>

Kelvin (K), the general temperature unit in the international standard units system. The Kelvin scale is an absolute thermodynamic temperature scale that uses absolute zero, a temperature at which all thermal movements end with a classic description of thermodynamics.

<u>Mass: </u>

Mass is both a feature of the objects weight and its resistance measurement to accelerate under the influence of pure force. The mass of the object also determines the gravitational force. The basic unit of mass is kilogram (kg)

<u>Time: </u>

Time is the measurement of how much distance the objects takes to travel from one to another (speed). It is expressed in seconds (s).

5 0
3 years ago
By process of incineration, a mystery substance is empirically determined to contain 40.00% carbon by weight, 6.67% hydrogen, an
Keith_Richards [23]

Answer:

C₂H₄O₂

Explanation:

Step 1: Divide each percentage by the atomic mass of the element

C: 40.00/12.01 = 3.331

H: 6.67/1.01 = 6.60

O: 53.33/16.00 = 3.333

Step 2: Divide all the numbers by the smallest one

C: 3.331/3.331 = 1

H: 6.60/3.331 ≈ 2

O: 3.333/3.331 ≈ 1

The empirical formula is CH₂O, with a molecular weight of 12 g/mol + 2 × 1 g/mol + 16 g/mol = 30 g/mol. The molecular weight of the compound must be a product of 30, such as 60 (between 55 and 62 g/mol). Since we have to multiply by 2 (30 to 60) to get to the molecular weight of the compound, we also have to multiply the empirical formula by 2 to get the chemical formula of the compound.

CH₂O × 2 = C₂H₄O₂

4 0
2 years ago
What change would occur in the kinetic energy of vapor if a container of vapor is placed at 0 Kelvin?
Vlada [557]
Partical will have no kinetic energy
5 0
3 years ago
Read 2 more answers
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