How many moles of water are produced from the following reaction, when 275 kJ of energy is given off? 4 NH3 + 3 O2 → 2 N2 + 6 H2O ΔH = -1530 kJ

Is this a scientific model? use complete sentences to explain why or why not. a graphic organizer showing the water cycle

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?