Curious carl and his lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. in one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid. they observed bubbles being produced and did a variety of tests to identify the escaping gas; it proved to be hydrogen. the reaction is represented by the following equation:
mg + 2hcl → mgcl2 + h2(g)

what is the mass, in grams, of two moles of hcl?
a) 18.3 g
b) 36.5 g
c) 72.0 g
d) 73.0 g

73.0 grams is the mass of two moles of HCl.

Explanation:

Moles of HCl = 2 moles

Molar mass of HCl = 36.5 g/mol

n = number of moles

m = Mass of the given compound

M = molar mass of the compound

m =

73.0 grams is the mass of two moles of HCl.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.