In a covalent bond, what holds atoms together? a. electrons that are shared between atoms b. protons that are transferred from one atom to another c. a “sea of electrons” around many atoms d. electrons that are transferred from one atom to another. explain bc my assignment requires me to explain

In a covalent bond, there's a chemical bond between two nonmetal atoms. covalent bonds shares electrons, so this means that A. is the only answer, I assume.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa