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you have 25.0ml hcl of unknown concentration. it takes 12.5 ml of 0.2 m naoh to neutralize the acid. determine the concentration of hcl in the following steps.

1. write the balanced chemical equation for the reaction
a. h+ + oh- > h2o
b. naoh + hcl > nacl + h2o
c. na+ + cl- > nacl
d. oh- + h+ > h2o

Which position represents spring in the southern hemisphere? a) b) c) d)

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.