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3 years ago

11

Calculeaza cantitatea de solutie de clorura de sodiu cu concentratia 30% necesara pentru obtinerea a 112 L de clor (c.n). Ce vol

um de hidrogen se obtine la catod?

1 answer:

Slav-nsk [51]3 years ago

7 0

Answer:

um i kinda dont speak spanish

Explanation:

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A mixture of BaCl2 and NaCl is analyzed by precipitating all the barium as BaSO4. After addition of an excess of Na2SO4 to a 3.9

rjkz [21]

Answer:

The mass % of BaCl2 is 47.24 %

Explanation:

Step 1: Data given

Molar mass BaSO4 = 233.38 g/mol

Molar mass BaCl2 = 208.23 g/mol

Step 2: The balanced equation

BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq)

Step 3: Calculate moles BaSO4

Moles BaSO4 = mass BaSO4 / molar mass BaSO4

Moles BaSO4 = 2.113 grams / 233.38 g/mol

Moles BaSO4 = 0.00905 moles

Step 4: Calculate moles BaCl2

For 1 mol BaCl2 we need 1 mol Na2SO4 to produce 1 mol BaSO4 and 2 moles NaCl

For 0.00905 moles BaSO4 we need 0.00905 moles BaCl2

Step 5: Calculate mass BaCl2

Mass BaCl2 = moles BaCl2 * molar mass BaCl2

Mass BaCl2 = 0.00905 moles *208.23 g/mol

Mass BaCl2 = 1.884 grams

Step 6: Calculate % BaCl2

% BaCl2 = (1.884 / 3.988 ) * 100%

% BaCl2 = 47.24 %

The mass % of BaCl2 is 47.24 %

7 0

3 years ago

How would the electron configuration of nitrogen change to make a stable configuration?

AnnZ [28]

The answers to the questions are as follows;

It would gain three electrons
The difference in their electronegativities.
The elements have filled Valence levels
potassium (K) with a 1+ charge
ClO-

Question 1:

How would the electron configuration of nitrogen change to make a stable configuration?

Since Nitrogen has 5 Valence electrons, it needs 3 electrons to attain it's octet configuration. As such, it gains 3 electrons.

Question 2:

Which quantity determines how two atoms bond.

The quantity which determines how two atoms bond is The difference in their electronegativities.

Question 3:

Which statement best explains why the elements in Group 18 do not have electronegativity values.

This is because the elements have filled Valence levels.

Question 4:

Based on patterns in the periodic table, which ion has a stable valence electron configuration

The ion which has a stable Valence electron configuration is potassium (K) with a 1+ charge

Question 5;

Which chemical formula represents a polyatomic ion?

The chemical formula which represents a polyatomic ion is; ClO-

5 0

3 years ago

Chemically combined substances, such as CO2, NH3, and H20 are called.....

Alex787 [66]

It is d. compounds because they have more than one element.

8 0

3 years ago

Read 2 more answers

As the pendulum moves from point 2 to point 3, what happens to its mechanical energy?potential energy is converted to kinetic en

ahrayia [7]

Answer: Potential energy is converted to kinetic energy and back again.

Explanation:At points 1 and 3, the pendulum stops moving, and its mechanical energy is purely potential. At point 2, the pendulum is moving the fastest, and its mechanical energy is purely kinetic. Therefore, as the pendulum moves from point 1 to point 3, its potential energy is first converted to kinetic energy, then back to potential.

3 0

3 years ago

The RNA and DNA backbone differ because the DNA sugar is missing what element?

hammer [34]

Answer:

D.

Explanation:

4 0

2 years ago