Which of the following is the balanced chemical equation for the combustion of methane, CH4? A) CH4 (g) + 2O2 (g) → CO2 (g) + 2H20 (g)

B) 2CH4 (g) + O2 (g) → 2CO2 (g) + H20 (g)

C) CH4 (g) + 2O2 (g) → 2CO2 (g) + 2H20 (g)

D) CH4 (g) + 2O2 (g) → CO2 (g) + H20 (g)

In any energy conversion, some of the energy is lost to the environment as question 5 options: electrical energy potential energy sound energy thermal energy

Which of the following is the correct formula for copper (i) sulfate trihydrate? cuso4 · 3h2o cuso4(h2o)3 cu2so4(h2o)3 cu2so4 · 3h2o

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.