5. __HCl + __NaOH-> __NaCl + __H2O 6. __FeS + __HCl-> __H2S + __FeCl2

7. __C2H4 + __O2-> __CO2 + __H2O

INEEDHELP

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

If you want to create an electrical current, which situation would produce a solution capable of this

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025