How many moles of water are produced from the following reaction, when 275 kJ of energy is given off?
4 NH + 3 O2 --> 2 N + 6 H,0 H = -1530 kJ

Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)