Given the balanced equation:
caco3(s) + 2hcl(aq) --> cacl2(aq) + h2o(l) + co2(g)
what is the total number of moles of co2 formed when 20. moles of hcl is completely consumed?
(1) 5.0 mol (3) 20. mol
(2) 10. mol (4) 40. mol

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.