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3 years ago

In the balanced equation, 4KO2 + 2CO2 = 2K2CO3 + 3O2 which two chemicals have a molar ratio of 3:4?

Chemistry

2 answers:

Sveta_85 [38]3 years ago

3 0

4KO₂ + 2CO₂ → 2K₂CO₃ + 3 O₂

The two chemicals that have a molar ratio of 3:4 is in equation above O₂ and KO₂

<em><u>explanation</u></em>

The molar ratio is the ratio between the amount in moles of two compounds that are involved in a chemical reaction.

In the equation above the mole ratio is determined by examining coefficient ( <em>number in front of the formula</em>)

the coefficient of O₂ is 3 while that of KO₂ is 4 therefore the mole ratio of O₂:KO₂ is 3:4

Jobisdone [24]3 years ago

3 0

Answer:

Oxygen gas and potassium superoxide have a molar ratio of 3:4.

Explanation:

$4KO_2 + 2CO_2\rightarrow 2K_2CO_3 + 3O_2$

According to reaction, 4 moles of potassium superoxide reacts with 2 moles of carbon dioxide to give 2 moles of potassium carbonate and 3 moles of oxygen gas.

Mole ratio is defined as ratio of moles of two chemical compounds in a given chemical equation of the reaction.

Moles of potassium superoxide = 4

Moles of carbon dioxide = 2

Moles of potassium carbonate = 2

Moles of oxygen gas = 3

Molar ratio of oxygen to potassium superoxide = $\frac{3 mol}{4 mol}=\frac{3}{4}$

Oxygen gas and potassium superoxide have a molar ratio of 3:4.

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A sample of nickel is heated to 99.8 degrees C and placed in a coffee cup calorimeter containing 150.0g water at 23.5 degrees C.

vesna_86 [32]

<u>Answer:</u> The mass of nickel that was originally heated is 28.4 grams.

<u>Explanation:</u>

When metal is dipped in water, the amount of heat released by metal will be equal to the amount of heat absorbed by water.

$Heat_{\text{absorbed}}=Heat_{\text{released}}$

The equation used to calculate heat released or absorbed follows:

$Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})$

$m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]$ ......(1)

where,

q = heat absorbed or released

$m_1$ = mass of nickel = ?

$m_2$ = mass of water = 150.0 g

$T_{final}$ = final temperature = 25.0°C

$T_1$ = initial temperature of nickel = 99.8°C

$T_2$ = initial temperature of water = 23.5°C

$c_1$ = specific heat of nickel = 0.444 J/g°C

$c_2$ = specific heat of water= 4.186 J/g°C

Putting values in equation 1, we get:

$m_1\times 0.444\times (25.0-99.8)=-[150.0\times 4.186\times (25.0-23.5)]$

$m_1=28.4g$

Hence, the mass of nickel that was originally heated is 28.4 grams.

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Which of the following could be considered a scientific statement?

slega [8]

B. This is the answer because this statement can be proven and is not an opinion.

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The concentration of solute particles in a solution, not the composition of the solute, determines a colligative properties .

Osmotic pressure, boiling point elevation, freezing point depression, and vapor pressure reduction are examples of ligand-like properties.

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2 years ago

The equilibrium constant for the reaction: HCHO(g) ⇌ H2(g) + CO(g).

tiny-mole [99]

Answer:

K = [H2] [CO] / [HCHO]

Explanation:

HCHO(g) ⇌ H2(g) + CO(g)

We can obtain the expression for the equilibrium constant for the above equation as follow:

Equilibrium constant, K for a given reaction is the ratio of the concentration of the product raised to their coefficient to the concentration of the reactant raised to their coefficient.

Thus, the equilibrium constant, K for the above equation can be written as follow:

K = [H2] [CO] / [HCHO]

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What is the amount of aluminum chloride produced from 40 moles of aluminum and excess chlorine?

Marrrta [24]

Answer:

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