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3 years ago

Which elements are included in group 5a

Chemistry

1 answer:

RUDIKE [14]3 years ago

7 0

Answer:

Group 5A (or VA) of the periodic table are the pnictogens:

the nonmetals nitrogen (N),

and phosphorus (P),

the metalloids arsenic (As)

antimony (Sb),

the metal bismuth (Bi).

and moscovium (Mc).

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When naming a transition metal ion that can have more than one common ionic charge, the numberical value of the charge can be in

Ivenika [448]

Answer: C) Roman numeral following the name.

Explanation: If we want to name an ionic compound like NaCl then we can easily write its name. Na is sodium and Cl is chlorine. First we write the name of the metal ion and then the name of the anion it has. Here we have mono atomic ion and for these we use the suffix -ide. So, the name will be sodium chloride.

Now, if we have something like $FeCl_3$ and we write the name as Iron chloride, then it will not be correct since Fe is a transition metal and it shows +2 and +3 oxidation states. So, to overcome this difficulty, a roman numeral is used for the oxidation state of the metal ion. The name of above compound will be Iron(III)chloride. Similarly, if we have $FeCl_2$ then its name will be written as Iron(II)chloride.

In both the above names, the roman numerals (III) and (II) are indicating numerical value of the charge of the metal ion. So, the correct choice is C) Roman numerals following the name.

when naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge can be indicated by a Roman numeral following the name.

8 0

4 years ago

The pOH of a solution is 9.70. what is the H+ concentration in the solution ?

Scrat [10]

Answer:

The H+ concentration is $10^{-4.3} M$

Explanation:

We know that for any solution,

pOH + pH = 14

Given,

pOH = 9.70,

Therefore using formula,we get,

pH = 14 - pOH,

pH = 14 - 9.70;

pH = 4.30

We also know,

If Concentration of H+ in a solution in C,

Then,

pH = -log(C) ------(Formula 1) and C = $10^{-pH}$ ----(Formula 2)

Therefore,

using formula 2, we get,

C = $10^{-pH}$

C = $10^{-4.30}$ M.

Therefore concentration of H+ in the given solution is $10^{-4.3} M$

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3 years ago

2 A certain gas of 25 g at 25°c and 0.65 atm occupies a volume of 23.52L Determine the molecule mass of the gas.

denpristay [2]

Answer:

${ \bf{PV= \frac{m}{M} RT}} \\ \\ { \tt{(0.65 \times 23.52) = \frac{25}{M} \times 0.081 \times (25 + 273)}} \\ \\ M = 39.5 \: g$

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3 years ago

What is chlorofluorocarbons <br>explain

Kryger [21]

Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants. ... Individual CFC molecules are labeled with a unique numbering system

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3 years ago

Why is it that when you have a strong acid and weak base your equivalence point is less than 7

yKpoI14uk [10]

Explanation:

When a strong acid, say $HCl$ reacts which a weak base, say $NH_3$ , the reaction is shown below as:-

$\text{NH}_3 (\text{aq}) + \text{HCl} (\text{aq}) \rightarrow {\text{NH}_4^+}(\text{aq}) + \text{Cl}^-(\text{aq})$

The salt further reacts with water as shown below:-

$\text{NH}_4^+ + \text{H}_2\text{O} \rightarrow \text{H}_3\text{O}^+ + \text{NH}_3$

Formation of $\text{H}_3\text{O}^+$ lowers the pH value of the solution as more hydrogen ions leads to less pH.

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3 years ago