Decomposer serve a key role in the nitrogen cycle primary because they

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

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.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit