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 enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

so she was walking and she stepped on warm jeffy , uh uh uhh dadye i just pooped my pants