Use Hess's Law to calculate the enthalpy change for the reaction WO3(s) + 3H2(g) ---> W(s) + 3H2O(g) from the following data: 2W(s) + 3O2(g) ---> 2WO3(s) DH = –1685.4 kJ 2H2(g) + O2(g) ---> 2H2O(g) DH = –477.84 kJ

i'm hoping this is like a multiple answer question. if it is then it would be, the location of the plants and also the height of the plants since one she wants to know where in her garden the chamomile grows best. but also to see which plants grew better in the location she also has to measure the plant itself. (if you can only choose one answer than it would be c).

he would use the colour black

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer