What is the change in internal energy ( ΔU ) of the system if q = –8 kJ and w = –1 kJ for a certain process? a. -7 kJ
b. 9 kJ
c. 7 kJ
d. -9 kJ
e. -8 kJ

Classify this reaction: 2al+n2-> aln.

No copying 15 pts how does a free-body diagram tell you about the net force on an object?

(04.05 hc) analyze the given diagram of the carbon cycle below. part 1: which compound does c represent? part 2: name a process that could release this compound into the air. part 3: explain how the elements that form it are conserved during the carbon cycle. use complete sentences to explain your answer. justify how this compound was created from a recycling of carbon in the carbon cycle. use complete sentences to explain your answer.