1 point Use Hess's Laws to solve. What is your final answer (delta H) for the
reaction? Write your answer as a whole number with the correct sign and
units. *
C 4
What is AH for the following reaction?
4C (s) + 5H, (g)
You are given the following reactions:
C(s) + 0, (g) CO, (9)
AH = -393.5 kJ
4CO, (g) + 5H0 (1)-- CH (9) + 6420, (g) AH =-2657.4 kJ
H (g) + 1/20,(g)-H0 (1)
AH = -241.8 kJ
+
+
Your answer

Iam in desperate need of with this !

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.