Answer:
Explanation:
a. CuO+ 2HCl⇒CuCl2+ H2O
b. = = 0,05 (mol)
⇒= =0,05 mol
⇒= 0,05×135=6,75 (g)
c. =2× =0,1 (mol)
⇒= 0,1×36,5= 3,65 (g)
⇒= ×100=36,5 (g)
⇒ Nồng độ phần trăm dd sau phản ứng= Nồng độ % dd CuCl2=×100= ×100≈ 16,67%
Answer:
Explanation:
Hello,
In this case, by knowing that the used NaOH equals in moles the acid (monoprotic) as shown below, during the titration:
By knowing the volume and the concentration of the NaOH, one obtains:
Thus, the molar mass of the acid is computed based on the previously computed moles and the given mass as follows:
Best regards.
The mass % of in the mixture is <u>9.93%</u>
<h3>What are hydrocarbon?</h3>
An organic substance called a hydrocarbon is made completely of hydrogen and carbon. Group 14 hydrides include, for example, 620 hydrocarbons.
The odours of gasoline and lighter fluid serve as examples of the relatively weak or insignificant odours of hydrocarbons, which are often colourless and hydrophobic.
They can be found in a wide variety of chemical forms and phases, including gases (like methane and propane), liquids (like hexane and benzene), low melting point solids (like paraffin wax and naphthalene), and polymers (such as polyethylene and polystyrene).
In the context of the fossil fuel industries, the term "hydrocarbon" refers to petroleum, natural gas, and coal that are produced naturally, as well as to their hydrocarbon derivatives and refined forms. The primary source of energy for the entire planet is the burning of hydrocarbons.
Learn more about Hydrocarbon
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I think the correct answer from the choices listed above is option B. The list which includes three type of chemical reactions would be decomposition, single replacement, and double replacement. These are the most basic reactions in chemistry and are the basis for other types of reactions.
<h3>
Option D(Last) :- </h3>
<em>The</em><em> charge on the nucleus is constant</em>.
<h3>Explanation:-</h3>
<em>The number of inner shell electrons being constant causes the shielding effect to remain constant across a period</em>
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<h3>Thank you:)</h3>