What is an organelle- A. A leaf cell that is responsible for performing photosynthesis
B. A structure inside the cell that performs a specific function
C. A group of cells that performs a task
D. A type of unicellular organism that can carry out life functions

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)