Ask question

Ask question

All categories

3 years ago

6

Which of the following would not have the same number of valence electrons as the others?

2 answers:

Luba_88 [7]3 years ago

8 0

Answer:

Carbon

Explanation:

Carbon has 4 valence electrons while the other ones have 6.

I appreciate it if you could mark me as Brainliest!

Fantom [35]3 years ago

5 0

carbon won't have same number of valence electrons as others

You might be interested in

Explain the process of fossil fuel formation.

topjm [15]

Explanation:

Fossil fuel is an overall term for covered ignitable geologic stores of natural materials, framed from rotted plants and creatures that have been changed over to unrefined petroleum, coal, flammable gas, or weighty oils by introduction to warmth and weight in the world's outside more than a huge number of years.

The consuming of petroleum products by people is the biggest wellspring of emanations of carbon dioxide, which is one of the ozone depleting substances that permits radiative compelling and adds to an unnatural weather change.

A little bit of hydrocarbon-based powers are biofuels gotten from climatic carbon dioxide, and consequently don't build the net measure of carbon dioxide in the environment.

6 0

3 years ago

or a particular isomer of C 8 H 18 , the combustion reaction produces 5104.1 kJ of heat per mole of C 8 H 18 ( g ) consumed, und

beks73 [17]

Answer:

The standard enthalpy of formation of this isomer of $C_{8}H_{18}$ is -220.1 kJ/mol.

Explanation:

The given chemical reaction is as follows.

$C_{8}H_{18}(g)+ \frac{25}{2}O_{2}(g) \rightarrow 8CO_{2}(g)+9H_{2}O(g)$

$\Delta H^{o}_{rxn}= -5104.1kJ/mol$

The expression for the entropy change for the reaction is as follows.

$\Delta H^{o}_{rxn}=[8\Delta H^{o}_{f}(CO_{2}) +9\Delta H^{o}_{f}(H_{2}O)]-[\Delta H^{o}_{f}(C_{8}H_{18})+ \frac{25}{2}\Delta H^{o}_{f}(O_{2})]$

$\Delta H^{o}_{f}(H_{2}O)= -241.8kJ/mol$

$\Delta H^{o}_{f}(CO_{2})= -393.5kJ/mol$

$\Delta H^{o}_{f}(O_{2})= 0kJ/mol$

Substitute the all values in the entropy change expression.

$-5104.1kJ/mol=[8(-393.5)+9(-241.8)kJ/mol]-[\Delta H^{o}_{f}(C_{8}H_{18})+ \frac{25}{2}(0)kJ/mol]$

$-5104.1kJ/mol=-5324.2kJ/mol -\Delta H^{o}_{f}(C_{8}H_{18})$

$\Delta H^{o}_{f}(C_{8}H_{18}) =-5324.2kJ/mol +5104.1kJ/mol$

$=-220.1kJ/mol$

Therefore, The standard enthalpy of formation of this isomer of $C_{8}H_{18}$ is -220.1 kJ/mol.

4 0

3 years ago

What is the average kinetic energy of any substance at 0 K?

Aloiza [94]

The answer is zero!

let me know if you need help with anything else! :)

5 0

2 years ago

Read 2 more answers

Why do we think mercury has so many tremendous cliffs?

wlad13 [49]

Answer:

it is sticky

Explanation:

hope it helps

4 0

2 years ago

Read 2 more answers

The kinetic energy of an object can be determined using the equation , where is the kinetic energy, is the mass, and is the spee

Cloud [144]

Answer:

0.5kg

Explanation:

Given parameters:

Speed of the object = 12m/s

Kinetic energy = 36J

Unknown:

Mass of the object = ?

Solution:

Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;

K.E = $\frac{1}{2}$ m v²

Insert the parameters and solve;

36 = $\frac{1}{2}$ x m x 12²

36 = 72m

m = 0.5kg

8 0

3 years ago