2. Balance the following equations: [14m] (a) 2 NO2(g) + _H2O() + O2(g) → HNO3(aq)
+
H2O(B)
(b) __C2H6(g) + O2(g) → _ CO2(8)
(c) _N2() + - H2(g) → __ NH3(8)
(d) __Na(s) +
Na(s) + _ 02(g) → __ Na2O(s)
(e) _Fe(s) +
Fe(s) + H2O(g) → _Fe3O4(s) +
H215)

Select the correct answer how does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed? ca the value of is negative the value of qis positive the value of a remains constant the value of a decreases the value of equals zero e

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?