How many moles of Cu are needed to react with 6.50 moles of AgNO;? Cu + 2 AgNO3 + Cu(NO3)2 + 2 Ag

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

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Aman applies a force of 500n to push a truck 100m down the street how much does he do?