Suppose you needed to explain the concept of the mole to a junior high school student. What would you tell them?

Which term names the container that holds the gear box and generator in a wind power system?

Sunny_sXe [5.5K]

The answer is A, turbine

7 0

4 years ago

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URGENT PLZ HELP

kramer

Answer:

A.

Explanation:

In an endothermic reaction heat is applied.

4 0

3 years ago

Which of the following contains ionic bonding? a. NaOH b.N2O4 c.NO3- d.NO2

qwelly [4]

The one that contains ionic bonding would be B

7 0

4 years ago

Classify each of the following as a Strong acid (sa) or a Weak acid (wa) and indicate how each should be written in aqueous solu

bazaltina [42]

Answer:

1. wa. Molecular form.

2. wa. Molecular form.

3. sa. Ionic form.

Explanation:

1. hydrocyanic acid

HCN is a weak acid. That means that in the following equilibrium, the molecular form (HCN(aq)) is favored, and that's how it should be written in solution.

HCN(aq) ⇄ H⁺(aq) + CN⁻(aq)

2. hypochlorous acid

HClO is a weak acid. That means that in the following equilibrium, the molecular form (HClO(aq)) is favored, and that's how it should be written in solution.

HClO(aq) ⇄ H⁺(aq) + ClO⁻(aq)

3. hydrochloric acid

HCl is a strong acid. That means that it completely dissociates and it should be written in the ionic form (H⁺(aq) + Cl⁻(aq)) when it is in solution.

HCl(aq) → H⁺(aq) + Cl⁻(aq)

3 0

3 years ago

*PLEASE HELP*

slava [35]

1 Double displacement

2 A) a reaction in which the exchange of electrons (or oxygen) occurs

3 A) Silver has a lower activity than hydrogen and cannot replace it.

4 C) 2C₂H₆ + 7O₂ → 4CO₂ +6H₂O

5. two

6.C) redox

7.B) The ions of two ionic compounds switch places and a gas is formed.

Explanation:

Problem 1:

Equation of the reaction:

Na₂S + Cd(NO₃)₂→CdS + 2NaNO₃

The above reaction is a double displacement reaction in which ions of two ionic compounds changes position to form new products.

A double displacement reaction is also known as metathesis.

The reaction involves actual exchange of partners to form new products.
In most double displacement reactions, precipitates are usually formed.
There might also be formation of water and any non-ionizing compound.
liberation of a gaseous product.

Learn more:

precipitates brainly.com/question/8896163

Question 2

A) a reaction in which the exchange of electrons (or oxygen) occurs:

Redox reactions are reactions in which one species is reduced and another species is oxidized simultaneously.

In this reaction types, there is exchange of electrons between reacting species.
In non-redox reactions, there is no exchange or transfer of electrons.
Redox reactions involves the transfer of electrons in which a specie gains and the other loses.

Learn more:

Oxidation brainly.com/question/2086855

Question 3:

A) Silver has a lower activity than hydrogen and cannot replace it.

H₂O + Ag→no reaction

The reaction above is a single replacement reaction

The replacement of a metallic ion in solution by a metal higher in the activity series than the metal in solution is this kind of reaction.
The positions of the two elements in the activity series provides the driving force for this reaction.
Hydrogen is higher than Ag in the reactivity series.
Since hydrogen is more reactive, Silver cannot displace it and the reaction will not occur.

Learn more:

Reactivity brainly.com/question/2193659

Question 4:

4 C) 2C₂H₆ + 7O₂ → 4CO₂ +6H₂O

Solution:

C₂H₆ + O₂→CO₂+H₂O

For combustion reactions in hydrocarbons, we use the expression below:

CₓHₙ + x + $\frac{n}{4}$ O₂ → xCO₂ + $\frac{n}{2}$ H₂O

x = 2 , n = 6

x + $\frac{n}{4}$ = 2 + $\frac{6}{4}$ = $\frac{7}{2}$

$\frac{n}{2}$ = $\frac{6}{2}$ = 3

multiply the coefficients by 2:

2, 7, 4 and 6

learn more:

Combustion brainly.com/question/1971314

Question 5

four

2NaNO₃ + CaCl₂ → 2NaCl + Ca(NO₃)₂

To find the number of atoms of Na, we must understand what an atom really is;

An atom is the smallest particle of an atom that takes part in chemical reaction. Distinct elements are made up unique types of atoms.

In the above reaction, we have:

2moles of NaNO₃ on the left hand side:

we have 2 Atoms of Na,

2 atoms N

6 atoms of O

2 moles of NaCl contains:

2 atoms of Na

2 atoms of Cl

In all, we have 4 atoms of Na

learn more:

Atoms brainly.com/question/10216585

Question 6

C) redox

AgNO₃(aq)+Cu(s)→Ag(s)+Cu(NO₃)₂(aq)

In a redox reaction, a specie is reduced and another is oxidized in the reaction.

In this reaction, one specie loses electrons and the other gains it.
Certain reactants change their oxidation state so as to form products.

In the reaction above,

Ag undergoes reduction; it goes from Ag⁺ to Ag from a +1 to zero.

whereas Copper goes from O to 2+ oxidation state.

Actually, this reaction is more appropriately described as a single displacement reaction in which atom higher in the activity series displaces the lower one.

learn more:

Redox Oxidation brainly.com/question/2086855

Question 7:

B) The ions of two ionic compounds switch places and a gas is formed.

A double displacement reaction is also known as metathesis or double replacement reaction.
It usually involves ionic compounds.
The reaction involves an exchange of partners to form new compounds.

One of the following serves as driving force for double displacement reactions:

formation of an insoluble compound called precipitate
formation of water or any other non-ionizing compound
liberation of a gaseous product.

Learn more:

Precipitate formation brainly.com/question/8896163

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7 0

3 years ago