In the control group, how did the number of grass blades change over the three week period?
In the experimental group, how did the number of
grass blades change over the three week period?
Was there a measureable difference in the number of
grass blades between the control group and the
experimental group at the end of three weeks?

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.

Which compound contain an iron with a 3+ charge