Zinc metal reacts with hydrochloric acid (HCl) to produce hydrogen gas. What best describes this reaction? A single replacement reaction takes place because zinc is more reactive than hydrogen. A single replacement reaction takes place because zinc is more reactive than chlorine. A double replacement reaction takes place because zinc is less reactive than hydrogen. A double replacement reaction takes place because zinc is less reactive than chlorine.
Answers
The correct statement is a single replacement reaction takes place because zinc is more reactive than hydrogen. Hence, option C is correct.
What is a chemical equation?
A chemical reaction is a representation of symbols of the elements to indicate the number of substances and moles of reactant and product.
A single replacement reaction takes place because zinc is more reactive than hydrogen.
Reaction
Zn+2HCl ⇒ ZnCl₂ + H₂
If we look at this reaction, the elements that play a role are those that undergo a redox reaction
Oxidation : Zn⇒Zn²⁺ + 2e
Reduction : 2H⁺ + 2e ⇒H₂
So Zn (located on the left) can push H (the element on the right) in the redox reaction ⇒ Zn is more reactive
A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds.
A+BC⇒AC+B
So the above reaction involves the elements Zn and H which undergo a redox reaction and are included in a single replacement.
Hence, option C is correct.
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Answer: The correct statement is a single replacement reaction takes place because zinc is more reactive than hydrogen.
Explanation:
A single displacement reaction is defined as the chemical reaction in which a more reactive metal displaces a less reactive metal from its chemical reaction. The reactivity of metals is determined from the series known as reactivity series.
The metals which lie above in the reactivity series are more reactive than the metals which lie below in the series. General equation for these reactions is given as:
where, A is more reactive metal than metal B.
Now, when zinc metal reacts with hydrochloric acid, it leads to the production of zinc chloride salt and hydrogen gas. The equation follows:
Here, zinc is more reactive metal than hydrogen because it lies above in the series.
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So no, chocolate milk does not come from brown cows
Hope this helps
No Nope Notta, zilch
C2H6O + O2
ethanol oxygen gas --------------------------------------------------
What elements will be present in the substances that are created when ethanol burns?
Answers
Answer:
Carbon, hydrogen, and oxygen only will be present in the substances that are created when ethanol burns.
Explanation:
Combustion means the process by which the burning of any substance, whether gaseous, liquid or solid, occurs.
Combustion reactions are reactions where oxygen intervenes as a reagent. Oxygen has the ability to combine with various elements to produce oxides, where then oxidation is the combination of oxygen with another substance. There are oxidations that are extremely slow, but when oxidation is rapid it is called combustion.
When a substance containing carbon and hydrogen (a hydrocarbon) undergoes complete combustion, or burning, oxygen is consumed and carbon dioxide is produced, and water.
Then the reaction is:
C₂H₆O + O₂ ⇒ CO₂ + H₂O
The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.
Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts .
The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.
And by multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.
So, considering the above, the balanced chemical equation is:
2 C₂H₆O + 6 O₂ ⇒ 6 CO₂ + 6 H₂O
In the previous combustion reaction you can see that:
- Elements in the reactants: C, H, O
- Elements in the products : C, H, O
You can see that in a chemical reaction the elements in the reagents must be the same elements present in the products.
So, carbon, hydrogen, and oxygen only will be present in the substances that are created when ethanol burns.
CO2 = Carbon and Oxygen
H2O = Hydrogen and Oxygen.
The exact molecular amounts or moles can be determined by balancing this combustion reaction.
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r =
=
= 4.2cm
h = 14.5cm
V= (3.14) * (
= 803.1
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