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Harrizon [31]
3 years ago
15

How many bonds are between the two carbon atoms in C2H2?

Chemistry
1 answer:
julsineya [31]3 years ago
6 0
C2H2 has 3 bonds between two carbon atoms
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Which contains elements with similar properties in the periodic table? A. a period B. a column C. a row
Semmy [17]

Answer: Option (B) is the correct answer.

Explanation:

Elements of a group represent similar chemical properties because they contain same number of valence electrons which determines their reactivity.

Hence, elements of a group have same chemical nature or property.

A group is represented by a vertical column in a periodic table.

On the other hand, a period is represented by a horizontal line.

Thus, we can conclude that a column contains elements with similar properties in the periodic table.

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4 years ago
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The acid-base reaction between HCl and NaOH produces a solution with a pH of 7 at the equivalence point (NaCl H2O). Why does an
Bess [88]

Answer:

Answer is in the explanation.

Explanation:

Before the equivalence point, the pH of the solution of HCl that is titrated with NaOH has a pH <<< 7. When you are adding more NaOH nearing, thus, to the equivalence point the change in pH occurs quickly, and, with 1 drop of excess of NaOH after equivalence, the pH of the solution change to a pH >>> 7

That means the volume added at pH 5 or pH 9 is, almost, the same doing the indicator work just as well as an indicator with change color at pH 7

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You titrate 25.0 mL of HCl solution of an unknown concentration with a 0.190 M NaOH solution. Complete neutralization of the HCl
galina1969 [7]

A titration is defined as 'the process of determining the quantity of a substance A by adding measured increments of substance B, the titrant, with which it reacts until exact chemical equivalence is achieved (the equivalence point)'.

The Molarity of the HCl Solution requires the addition of 24.6 mL of titrant is 0.0836 M (to 3 significant figures)

<h3>What is Titrant?</h3>

A reagent solution of precisely known concentration that is added in titration

Given reaction HCl + NaOH ===> NaCl + H_2O  neutralization reaction

Note that the mole ratio is 1:1 meaning that 1 mole HCl reacts with 1 mole NaOH to produce 1 mole NaCl and 1 mole H_2O

Find moles of NaOH used:

18.45 ml x 1 L/1000 ml x 0.085 mol/L = 0.002091 moles NaOH used

This meant that there must be 0.002091 moles of HCl present in the 25.0 mls.

We want to find the molarity (M) which is moles HCl/liter of solution.  We know the moles, and we also know the liters of solution (25.0 mls x 1 L / 1000 mls = 0.025 liters)

M = 0.002091 moles HCl / 0.025 liters = 0.08364 M = 0.0836 M (to 3 significant figures)

Learn more about Titration Here;
brainly.com/question/27107265

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The ability to do work is.....<br><br> matter<br><br><br><br> energy<br><br> molecules
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