Write the balanced equation for the reaction of potassium carbonate and hydrochloric acid. What is the excess reagent in this experiment? What happens to that excess reagent at the end of the experiment? Calculate the mass of LiCl that would be produced if 1.5000 grams of Li_2CO_3 reacts with excess HCl. Calculate the mass of MgCO_3 that would be required to produce 1.0000 grams of MgCl_2. If only 4.000M HCl was available for you to use, calculate the volume of 4.000 M HCl solution required to completely react with 1.700 grams of Na_2CO_3.

Polyethylene is a strong synthetic polymer that can be used to make toys and bottles. this makes plastics which are important also to people but sometimes it lead to harmful environmental effects such as global warming if these plastics are burned.

Given data,temperature, t = 230°c = 503 kconsider the chemical reaction,ch₃oh(l) + 1/2 o₂(g)  → ch₂o(g) + h₂o(l)calculate the enthalpy change for the reaction: δh⁰rxn =  σnδh⁰f(products) -  σmδh⁰f(reactants)substitute the values from the table: δh⁰rxn = { -115.9 + (-285.8)} - {0+(-238.7)}              = -163.0 kjcalculate the entropy change for the reaction.δs⁰rxn = (219 + 70) - (127.2 + 1/2 x 205.2) = 59.2 j/kconsider the expression for free energy: δg⁰rxn =  δh⁰rxn - t  δs⁰rxnsubstitute the values in the above equationδg⁰rxn = -163 x 10³ - (503 x 59.2)              = -192777.6 j              = -192.777 kj

Its carbonyl

It's about -20°c to -15°c.