Calculate the enthalpy of formation of butane, C4H10, using the balanced chemical
equation and information in Appendix Table B–5 and Table B–14. Write out the solution
according to Hess’s law.

How have the greenhouse gasses increased from the year 2000 to 2018

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.