Selecciona la ecuación química que contenga la siguiente definición de la simbología
química. Indica que la sustancia se precipita. *
*
245)
NaOH (ac) + HClac)
NaCl(ac) + H2001
360)
CO(g) + H2000
CO2(g)
+
H2)
154)
H3PO4(1) + Mg(OH)2(s)
Mg3(PO)2(s) T +
H2O(0
320) CH10(s) + O212)
►H2O(g) + CO2(8)

the answer is b.) hydrogen bonds between bases.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%