The primary source of energy for planet Earth is sunlight. Since animals cannot absorb and use light directly, how do animals obtain energy? A. They obtain energy indirectly from photosynthesis in plants
B. They eat mushrooms which grow in the dark
C. They eat other animals which make their own energy
D. They get energy from gaseous molecules in the air

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.)