How much energy is required to decompose 800 g of pcl3, according to the reaction below? the molar mass of pcl3 is 137. 32 g/mol and may be useful.

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

Match each fossil with the layer where it’ll be present based on those conditions.

When you look at the data about all of the children in your setting, you can learn a. about child development. b. how well each individual child is performing. c. what outside factors you need to change. d. how effective your instruction and environment are.