What is the answer CaCI_2 +KOH

Which mathematical relationship should you us to convert moles of a substance into grams

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

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as