Astudent measured 257 ml of 0.254 m hcl solution into a beaker. how many moles of hci were in the beaker?

0.0653 mol HCl

Explanation:

0.254 M mens 0.254 mol per L, or 0.254 mol/L

257 mL=0.257 L

0.254 mol/L * 0.257 L =0.0653 mol

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

i think its 100.

hope this !