Which equation is a correctly written thermochemical equation?

C3H8 (g) + 5O2 (g)→3CO2 (g) + 4H2O (l) , ΔH= −2,220 kJ/mol

Fe (s) + O2 (g)→Fe2O3 (s) , ΔH= −3,926 kJ

NH4Cl→NH4 + + Cl−

2C8H18 + 25O2→16CO2 + 18H2O , ΔH= −5,471 kJ/mol

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

57.09 minus 7.0435 equals

step-by-step explanation:

just subtrach them both and u get the answer of 50.0465

42.4 6th grade students prefer hip hop

step-by-step explanation:

40 percent of 106 = 42.4

a. (14,375+570)(5.3) b. 158,417$

step-by-step explanation:

a. you are basically just setting up the equation. f= amount of debt hence 14,375. g= how much she is borrowing from her parents weekly hence 570 and t= the interest on her debt. creating the equation.

b.   14,375+570= 14,945

      14,945 x 5.3 = 79,208.5

      79,208.5 x 2(years) = 158,417(answer)