All categories

3 years ago

Which of the following are correctly balanced reactions

Chemistry

2 answers:

Mazyrski [523]3 years ago

7 0

A and B are correctly balanced reactions. They have the same number of atoms in both sides of the reaction

Lana71 [14]3 years ago

6 0

Answer:

A and B, are correctly balanced reactions ---> APEX

Explanation:

You might be interested in

PLS HELP THIS IS ACTUALLY SCIENCE

Alekssandra [29.7K]

Answer:

Death rates, Birth rates, and immigration rates

Explanation:

5 0

3 years ago

Read 2 more answers

For each reaction, find the value of ΔSo. Report the value with the appropriate sign. (a) 3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)

aev [14]

Answer:

ΔS° = -268.13 J/K

Explanation:

Let's consider the following balanced equation.

3 NO₂(g) + H₂O(l) → 2 HNO₃(l) + NO(g)

We can calculate the standard entropy change of a reaction (ΔS°) using the following expression:

ΔS° = ∑np.Sp° - ∑nr.Sr°

where,

ni are the moles of reactants and products

Si are the standard molar entropies of reactants and products

ΔS° = [2 mol × S°(HNO₃(l)) + 1 mol × S°(NO(g))] - [3 mol × S°(NO₂(g)) + 1 mol × S°(H₂O(l))]

ΔS° = [2 mol × 155.6 J/K.mol + 1 mol × 210.76 J/K.mol] - [3 mol × 240.06 J/K.mol + 1 mol × 69.91 J/k.mol]

ΔS° = -268.13 J/K

7 0

3 years ago

As you have seen, ozone is formed in the upper atmosphere through the reaction:

baherus [9]

The rate law equation for Ozone reaction

r=k[O][O₂]

<h3>Further explanation</h3>

Given

Reaction of Ozone :.

O(g) + O2(g) → O3(g)

Required

the rate law equation

Solution

The rate law is a chemical equation that shows the relationship between reaction rate and the concentration / pressure of the reactants

For reaction

aA + bB ⇒ C + D

The rate law can be formulated:

$\large{\boxed{\boxed{\bold{r~=~k.[A]^a[B]^b}}}$

where

r = reaction rate, M / s

k = constant, mol¹⁻⁽ᵃ⁺ᵇ⁾. L⁽ᵃ⁺ᵇ⁾⁻¹. S⁻¹

a = reaction order to A

b = reaction order to B

[A] = [B] = concentration of substances

So for Ozone reaction, the rate law (first orde for both O and O₂) :

$\tt \boxed{\bold{r=k[O][O_2]}}$

5 0

3 years ago

Which materials are typically used as thermal insulators? Check all that apply.

vaieri [72.5K]

Answer : The correct options are, (B) Foam, (C) Ceramic, (D) Wood and (E) Plastic

Explanation :

As we know that the conductor is the material that conduct or transmits the energy or electricity through them and insulator is the material that resist the energy transfer.

There are different types of insulators and conductors which are:

Electrical conductor : It is a type of material that conducts electrons, protons and ions. It conduct electricity. For example : silver, gold, copper, steel, brass, etc.

Thermal conductor : It is a type of material that conducts heat. For example: diamond, silver, gold, etc.

Electrical insulator : It is a type of material in which the electrical charges do not flow freely that means very little amount of electric current flow through them. For example : glass, plastic, rubber, porcelain, pure water, dry paper, dry wood, etc.

Thermal insulator : It is a type of material that reduces the transfer of heat between the object in thermal contact. For example : polystyrene foam, water, wool, plastic, ceramic, wood.

Hence, the materials typically used as thermal insulators are, foam, ceramic, wood and plastic.

5 0

3 years ago

Read 2 more answers

What happens in a chemical reaction?

MAXImum [283]

The correct answer is option C

3 0

3 years ago