The gasification of coal is a method of producing methane by the following reaction. c(s) + 2h2(g) → ch4(g) ∆h=?
find ∆h by using the enthalpy changes in the following combustion reactions:
c(s) + o2(g) → co2(g) ∆h=-394 kj
h2(s) + ½ o2(g) → h2o(l) ∆h=-286kj
ch4(g) + 2o2(g) → co2(g) + 2h2o(l) ∆h=-891kj

(a) 75 kj
(b) -75 kj
(c) 1856 kj
(d) -1856 kj

One does not belong why? ice, gold ,wood ,diamond and table salt

Calculate the number of moles of ethane in 100 grams

Answer asap need 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.