Which coefficient will balance the following equation Ca + N2 → Ca3N2 a. 6
b. 3
c. 1
d. 2

The modern periodic table has groups.

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

Look at the bean data from days 4–6. use these data to explain how natural selection changed the number of dark red walking beans over time. writing part