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Pani-rosa [81]
3 years ago
11

How many moles of ions are produced by the dissociation of 0.5 mol of na2co3?

Chemistry
2 answers:
tatiyna3 years ago
5 0
The number of moles of ions that   are produced  by  the dissociation  of  o.5 mol  of Na2CO3  is   1.5  moles


    Explanation
 write the  equation  for dissociation  of  Na2CO3
that is Na2Co3 →  2Na^+(aq)  +  CO3^2- (aq)

by  use of mole ratio  of Na2CO3 to Na^+ and to  CO3^2-   which is 1:2:1  the  moles of  Na^+ =  0.5  x2 =  1mole
the  moles of CO3^2-  =  0.5  x1  = 0.5 moles


total  moles = moles  of CO^2-     +   moles  of  Na^+

that   is  1 mole + 0.5 mole =  1..5  moles
Alexus [3.1K]3 years ago
3 0

Answer:

1.5 mol ions

Explanation:

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3 0
3 years ago
Classify each of the following chemical reactions.
natulia [17]
1. Synthesis or Combination reaction
2. Double replacement reaction
3. Single Replacement reaction
4. Decomposition reaction

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7 0
3 years ago
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How are models useful in describing how molecules are formed
Nady [450]

Answer:

The purpose of molecular modeling is to provide a three-dimensional image (either physical or software-based) that allows a chemist to better see the manner in which atoms and molecules can interact. These models can be used to interpret existing observations or to predict new chemical behavior.

Explanation:

It can describe shape and how they connect while forming the electrons.

6 0
3 years ago
When 3243. grams of iron (III) chloride are reacted with 511.8 grams of hydrosulfuric acid, which is the limiting reactant?
AleksAgata [21]

Answer:

Hydrosulfuric acid will act as limiting reactant.

Explanation:

Given data:

Mass of iron(III) chloride = 3243.0 g

Mass of hydrosulfuric acid = 511.8 g

Limiting reactant = ?

Solution:

Chemical equation:

2FeCl₃ + 3H₂S       →       Fe₂S₃ + 6HCl

Number of moles of iron(III) chloride:

Number of moles = mass/molar mass

Number of moles = 3243.0 g/ 162.2 g/mol

Number of moles = 20 mol

Number of moles of hydrosulfuric acid:

Number of moles = mass/molar mass

Number of moles = 511.8 g/ 34.1 g/mol

Number of moles = 15 mol

Now we will compare the moles of both reactant with products

                      FeCl₃          :          Fe₂S₃

                       2                :            1

                      20               :          1/2 ×20 = 10

                      FeCl₃          :            HCl

                       2                :              6

                      20               :          6/2 ×20 = 60

                      H₂S             :          Fe₂S₃

                       3                :            1

                      15               :          1/3 ×15 = 5

                      H₂S            :            HCl

                       3                :              6

                      15                :          6/3 ×15 = 30

Hydrosulfuric acid producing less number of moles of product thus, it will act as limiting reactant.

 

5 0
3 years ago
3) The mass of a piece silver is 10.5 g. If a sample of pure silver has a volume of 13 cm3, what is the
lakkis [162]

Answer:

<h3>The answer is 0.81 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass of metal = 10.5 g

volume = 13 cm³

We have

density =  \frac{10.5}{13}  \\  = 0.8076923...

We have the final answer as

<h3>0.81 g/cm³</h3>

Hope this helps you

8 0
3 years ago
Read 2 more answers
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