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LenKa [72]
4 years ago
15

How many electrons are in sodium-20?

Chemistry
1 answer:
Eva8 [605]4 years ago
5 0

Answer:

11

Explanation:

According to the periodic table Sodium (Na) has 11 electrons.

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What is the strongest intermolecular force present in SO2? (EN Values: S = 2.5; O = 3.5). Please explain!
Afina-wow [57]

Answer:

Dipole-Dipole force

Explanation:

Dipole - Dipole force -

These are the force of attraction , that occurs between two dipole , i.e. ,a species with two poles , hence , the attraction between the delta positive charge of first species with the delta negative charge of the second species , arises to a dipole - dipole force of attraction.

Hence, from the question,

SO₂ , is a polar compound , where O is more electronegative in comparison to S , thus , O attains a delta negative charge and S attains a delta positive charge and therefore , generates a dipole , and interacts with the dipole of the second molecule of SO₂ , arising a  dipole - dipole force of attraction .

5 0
3 years ago
Which of the following is the correct unit for molarity? mol/L L/mol g/mol mol × L
Tems11 [23]

mol/L

Molarity indicates the number of moles of solute per liter of solution.

5 0
3 years ago
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4. What is the specific heat of iron, if it requires 1050 J of heat energy to raise the temperature of
Sholpan [36]

Answer:

0.4589J/g°C

Explanation:

Heat energy = 1050J

Mass of iron = 220.0g

Initial temperature (T1) = 10°C

Final temperature (T2) = 20.4°C

Heat energy = mc∇T

Q = mc∇T

Q = heat energy

M = mass of the substance

C = specific heat capacity of the substance

∇T = change in temperature = T2 - T1

Q = m×c×(T2 - T1)

1050 = 220 × c ×(20.4 - 10)

1050 = 220c × (10.4)

1050 = 2288c

c = 1050 / 2288

C = 0.4589J/g°C

The specific heat capacity of iron is 0.4589J/g°C

4 0
3 years ago
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Answer:

A Glucose C6H12O6 is a covalent compound while NaCl sodium chloride is a ionic compound.

B Stronger molecular forces are present in NaCl because ionic bond is stronger than covalent bond.

C melting point allow us to predict the strength of intermolecular forces

High melting point stronger molecular forces and vice versa.

Explanation:

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3 years ago
Describe the results of Ernest Rutherford's gold-foil experiment and explain how his results changed ideas about the distributio
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4 years ago
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