What is the molar mass of strontium (Sr)? O A. 38 g/mol
O B. 38g
O C. 87.62 g/mol
O D. 87.62 g

C. 87.67 g/mol

Explanation:  The molar mass of an atom is the mass of a singular atom. Therefore the molar mass of Strontium would be one mole of Strontium.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72

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