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3 years ago

Given the following reaction:

Chemistry

1 answer:

Elan Coil [88]3 years ago

7 0

(Answer) 0.166 moles of copper (I) nitride are needed.

Mass of copper (I) oxide = 35.7 g

Moles of copper (I) oxide formed by the reaction = (Mass / molar mass)

= ( 35.7 g / 143.09 g/mol ) = 0.25 moles

According to the balanced chemical equation,

mole ratio of copper (I) nitride and copper (I) oxide = 2: 3

Therefore, moles of copper (I) nitride needed to form 0.25 moles of copper (I) oxide = (2/3 x 0.25) moles = 0.166 moles.

Thus, 0.166 moles of copper (I) nitride are needed to form 0.25 moles of copper (I) oxide.

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Method A: Does not transfer heat through solids and requires a medium for heat transfer Method B: Requires a material medium and

Paha777 [63]

Method A is Convection

Method B is Conduction

Explanation:

From the problem, we can infer that method A is convection and method B is conduction.

Conduction, convection and radiation are the three main methods of heat transfer.

Conduction and convection requires material medium to propagate.
Radiation occurs in the absence of a material medium.
Conduction mostly occurs in solid. Here, heat is transferred from one hot end to the cold end of the solid. The vibration of the particles in the hot end causes the transfer of kinetic energy to the cold end until thermal equilibrium is reached.
In convection, heat is primarily transferred in fluids as a result of density differences. Convection involves the motion of the materials of the medium. Hot air is light and it rises whereas cold air is dense and it sinks.

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3 years ago

Two different liquids are mixed together. Which observation indicates that an exothermic chemical reaction has taken place?

Lilit [14]

Answer:

rise in temp I think

Explanation:

6 0

3 years ago

Which of these correctly defines the pOH of a solution? the log of the hydronium ion concentration the negative log of the hydro

Likurg_2 [28]

Answer : The correct option is, the negative log of the hydroxide ion concentration.

Explanation :

pOH : It is defined as the negative logarithm of hydroxide ion concentration. It is a measure of the alkalinity of the solution.

Formula used :

$pOH=-log[OH^-]$

$[OH^-]$ is the concentration of $OH^-$ ions.

When pOH is less than 7, the solution is alkaline.

When pOH is more than 7, the solution is acidic.

When pOH is equal to 7, the solution is neutral.

4 0

3 years ago

Read 2 more answers

Choose the best answer. The 6.0 M HCl solution must be added to the crucible in the fume hood because

antiseptic1488 [7]

Answer:

The answer is A

Explanation:

When nH2/nO2 =3/4 => it can cause explosion

4 0

3 years ago

If 5 moles of Al2O3 are formed in the reaction " 4 Al + 3 O2 ---> 2 Al2O3 " How many moles of Aluminum (Al) & How many mo

True [87]

We are given the reaction:

4 Al + 3 O₂ → 2 Al₂O₃

___________________________________________________________

<u>Finding moles of Al reacted:</u>

from which, we can deduce that 4 moles of Al produces 2 moles of Al₂O₃

Ratio between their moles:

Moles of Al / Moles of Al₂O₃

4 / 2 = 2 / 1

so,

Moles of Al / Moles of Al₂O₃ = 2

Moles of Al = 2* Moles of Al₂O₃

we are given that 5 moles of Al₂O₃ are formed, replacing the value:

Moles of Al = 2*5

Moles of Al = 10 moles

___________________________________________________________

<u>Finding moles of O₂ reacted:</u>

from the given equation, we can also say that 4 moles of Al react with 3 moles of O₂

Moles of Al / Moles of O₂ = 4 / 3

3 * (Moles of Al) = 4* (Moles of O₂)

we know that 10 moles of Al reacted,

3 * (10) = 4 * (moles of O₂)

Moles of O₂ = 30/4

Moles of O₂ = 7.5 moles

4 0

2 years ago