Please help, I don't understand this question 5.00 g of a mixture of sodium carbonate and potassium bromide was dissolved and made up to the mark in a 250. mL volumetric flask. 25.0 mL portions of this solution were neutralized by an average of 24.7 mL of 0.200 mol L-1 HCl. Find the percentage of sodium carbonate in the original 5.00 g sample of the mixture.

n+h→nh3

we must remember that nitrogen and hydrogen are both diatomic molecules in their standard gas form. this adjusts the equation to

n2+h2→nh3

now we need to adjust coefficients in order to balance the atoms on each side of the equation. currently we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.

we can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.

n2+3h2→2nh3

this gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.

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.

the product of the pressure and volume is also constant

hi my dude or dudette