Donner la configuration éléctronique des atomes de soufre et de magnésium

Afin d'écrire la configuration électronique de Mg, nous devons d'abord connaître le nombre d'électrons de l'atome de Mg (il y a 12 électrons).

Explanation:

In order to write the Mg electron configuration we first need to know the number of electrons for the Mg atom (there are 12 electrons).

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.