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2 years ago

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1 answer:

5 0

The moles of O2 are needed to react completely with 1.00 mol of C₂H₂ is 5 mol , 0.23 moles of C₂H₂ are needed to form 0.46 mol of CO₂ .

<h3>What is a Balanced Reaction ?</h3>

A balanced reaction is a reaction in which the number of atoms present in the reactants is equal to the number of atoms in the products.

It is given in the question that

the combustion of Acetylene is given by

2 H―C≡C―H + 5 O₂ → 4 CO₂ + 2 H₂O

Given moles of Acetylene = 1 mol

Moles of oxygen needed = 5 mol

as the mole fraction of Acetylene to Oxygen is 1 :5

The mole of Acetylene needed to form 0.46 mol of CO₂ is ?

mole fraction of CO₂ to Acetylene is 4:2

Therefore 0.23 moles of CO₂ is required.

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Consider a galvanic cell based on the reaction Al^3+_(aq) + Mg_(s) rightarrow Al_(s) + Mg^2+ _(aq) The half-reactions are Al^3+

grin007 [14]

Answer: The standard cell potential of the cell is -0.71 V

Explanation:

The half reactions follows:

Oxidation half reaction: $Mg\rightarrow Mg^{2+}+2e^-;E^o_{Mg^{2+}/Mg}=-2.37V$ ( × 3)

Reduction half reaction: $Al^{3+}(aq.)+3e^-\rightarrow Al(s);E^o_{Al^{3+}/Al}=-1.66V$ ( × 2)

The balanced cell reaction follows:

$2Al^{3+}(aq.)+3Mg(s)\rightarrow 2Al(s)+3Mg^{2+}(aq.)$

To calculate the $E^o_{cell}$ of the reaction, we use the equation:

$E^o_{cell}=E^o_{cathode}-E^o_{anode}$

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.

Putting values in above equation, we get:

$E^o_{cell}=-2.37-(-1.66)=-0.71V$

Hence, the standard cell potential of the cell is -0.71 V

8 0

3 years ago

Which of the following substance is being reduced in the following reaction.? Cu (s) + 2AgNO3 (aq) + 2Ag (s) + Cu(NO3)2 (aq) A)

nikklg [1K]

Answer: The correct answer is Option A.

Explanation:

Oxidation reaction is defined as the reaction in which an atom looses its electrons. Here, oxidation state of the atom increases.

$X\rightarrow X^{n+}+ne^-$

Reduction reaction is defined as the reaction in which an atom gains electrons. Here, the oxidation state of the atom decreases.

$X^{n+}+ne^-\rightarrow X$

For the given chemical reaction:

$Cu(s)+2AgNO_3(aq.)\rightarrow 2Ag(s)+Cu(NO_3)_2(aq.)$

The half reactions for the above reaction are:

Oxidation half reaction: $Cu(s)\rightarrow Cu^{2+}(aq.)+2e^-$

Reduction half reaction: $2Ag^+(aq.)+2e^-\rightarrow 2Ag(s)$

From the above reactions, copper is loosing its electrons. Thus, it is getting oxidized.

Silver ion is gaining electrons and thus is getting reduced.

Hence, the correct answer is Option A.

3 0

3 years ago

Aqueous solutions of nitric acid and calcium hydroxide can neutralize each other to produce a compound that is soluble in water.

nikdorinn [45]

Answer:

Cation Ca2+

Anion NO3-

Explanation:

Let’s first start with a chemical equation for the reaction.

Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O.

The name of the compound formed is calcium trioxonitrate V

The Cation there is the positive ion and it Is the calcium ion.

The Anion there is the negative ion and it Is the NO3- ion called trioxonitrate V ion

3 0

3 years ago

Question 2

Leokris [45]

Renewable resources are abundant.

Renewable resources can be used to generate electricity.

Renewable resources can be replaced when used.

Renewable resources are found in nature.

Explanation:

Renewable resources are resources that are abundant in nature and when used can easily be replenished at fast rate.

Non-renewable resources are limited in nature. They have to be conserved to ensure their all round availability. They are not quickly and easily renewed as it takes several years for them to form. Usually, it takes millions of years to form.

Renewable resources all abounds around us. Water, air, biomass etc are all renewable resources. We cannot use them up.
Renewable resources can be harnessed to generate electricity. Hydroelectricity comes from water.
Resources are renewable because of the ease by which they can be replaced when used up.
They can also be found in nature.

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4 0

4 years ago

A gas with a temperature of 98.0 degrees Celsius has a volume of 88.0 ml. The volume is increased to 100.0 ml. What is the new t

Gekata [30.6K]

Answer:

T2 = 421.76K or 148.61°C

Explanation:

T1 = 98°C = (98 + 273.15)K = 371.15K

V1 = 88mL = 88cm³

T2 = ?

V2 = 100mL = 100cm³

1mL = 1cm³

From Charles Law,

V1 / T1 = V2 / T2

T2 = (V2 * T1) / V1

T2 = (100 * 371.15) / 88

T2 = 37115 / 88

T2 = 421.76K

T2 = 148.61°C

6 0

3 years ago