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

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)