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3 years ago

How does the atomic radius increase?

Chemistry

1 answer:

Helen [10]3 years ago

5 0

Answer:

increases as you move down a group as the number of electrons increases. Therefore, the atomic radius increases as the group and energy levels increase

Explanation:

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Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the following reaction: C(s)+2H2O(g)→2H2

madam [21]

The question is incomplete , complete question is:

Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the following reaction:

$C(s)+ 2 H_2O(g)\rightarrow 2H_2(g)+CO_2(g).\Delta H=?$

Note that the average bond energy for the breaking of a bond in CO2 is 799 kJ/mol. Use average bond energies to calculate ΔH of reaction for this reaction.

Answer:

The ΔH of the reaction is -626 kJ/mol.

Explanation:

$C(s)+ 2 H_2O(g)\rightarrow 2H_2(g)+CO_2(g).\Delta H=?$

We are given with:

$\Delta H_{H-O}=459 kJ/mol$

$\Delta H_{H-H}=432 kJ/mol$

$\Delta H_{C=O}=799 kJ/mol$

ΔH = (Energies required to break bonds on reactant side) - (Energies released on formation of bonds on product side)

$\Delta H=(4\times \Delta H_{O-H})-(2\times \Delta H_{H-H}+2\times\Delta H_{C=O})$

$=(4\times 459 kJ/mol)-(2\times 432 kJ/mol+2\times 799 kJ/mol$

$\Delta H=-626 kJ/mol$

The ΔH of the reaction is -626 kJ/mol.

5 0

4 years ago

Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (Use the periodic table as ne

hodyreva [135]

Answer:

Explanation:

Group Most Likely Ionic Charge Number of Valence Electrons

I +1 1

II +2 2

III +3 3

IV +4 or -4 4

V -3 5

VI -2 6

VII -1 7

VIII 0 8

For elements in group IV and above, their ionic charge is (8-number of their valence electrons.)

5 0

3 years ago

Read 2 more answers

Which of the following terms refers to the area immediately around the eye

Anit [1.1K]

Answer:

the eye socket

Explanation:

the area around the eye is called the eye socket or the eye orbit.

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3 years ago

What physical property is changed when a waitress pours coffee from a pot into four mugs?

Mandarinka [93]

The correct answer is volume

3 0

3 years ago

What occurs to the kinetic energy when the mass moving object is doubled?

seraphim [82]

Answer:

Kinetic energy increases.

Explanation:

Kinetic energy is energy you get from moving. The equation for KE depends on mass as well as velocity. If you increase one of these factors, KE will increase too.

5 0

3 years ago